Witnesses have described harrowing scenes in a quiet neighbourhood after a teenage boy was allegedly deliberately hit and killed by a car overnight in Melbourne.

Police launched a homicide investigation after injured 16-year-old Elijah Agua died on the street in Taylors Lakes, in Melbourne's north-west.

Detectives believe Elijah was deliberately struck by a car as he crossed a road with a group of teenagers.

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A witness said she held the dying boy while another neighbour performed CPR.

"It was just heartwrenching to think that somebody had to do that to the young boy," she said.

"It doesn't matter what sort of character he is … nobody deserves to die like that."

Police said the group was targeted as they crossed Chichester Dve around 7pm when the car drove at and struck three teenagers in the group before fleeing the scene.

Friends close to the St Albans Secondary College student described him as "innocent" and "warm-hearted".

The victim's ex-girlfriend Isabella Emini said she was disgusted and angry at the boy's death.

"He was my first love, I was his first true love and it hurts me, it really hurts me," she said.

"He was young, he had a good heart, he always showed love, he always showed respect, always showed loyalty to the ones he actually loved."

Paramedics were called to Chichester Drive in Taylors Lakes in the city's north-west but the boy died at the scene.

Two other boys, a 16-year-old from Melton and 15-year-old from Keilor Downs, were taken to hospital with non-life-threatening injuries.

Homicide Squad detectives, along with the Major Collision Investigation Unit, are working to establish the exact circumstances of the incident.

Anyone who witnessed the incident, has CCTV, dashcam footage or any information is urged to contact Crime Stoppers on 1800 333 000 or submit a confidential report online

The distraught community of Daylesford in regional Victoria is calling for safety upgrades to a dangerous stretch of road after a car crash claimed the lives of five people in a hotel beer garden.

The victims were sitting at the Royal Hotel on Sunday afternoon when a white BMW SUV crashed into outdoor tables.

While it's still unclear why the incident occurred, locals are asking whether the tragedy could have been avoided.

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The beer garden sits at the end of a busy intersection, with the road situated close to outside diners.

The road leading to the crash site is long and steep, and is constantly used by big trucks and regular vehicles.

Following Sunday's tragedy, locals are now calling for bollards to be placed in front of the popular spot to protect diners.

"I think it would give people a sense of comfort," Daylesford resident Kim Middleton told 9News.

"A lot of families go there with young children and it's always in the forefront of your mind."

"That lawned area always has people on it, especially at holiday times, so protection is a good idea," resident Markie Linhart said.

"I know hindsight is a wonderful thing but that's how things get done."

Pratibha Sharma, her husband Jatin Chugh, and her daughter Anvi were killed when the vehicle ploughed into diners on Sunday.

Their friend Vivek Bhatia, 38, and his 11-year-old son Vihaan were also killed.

Hepburn Shire deputy mayor Lesley Hewitt said the council would wait for the results of the investigation before any changes were made.

The local council is making plans for a permanent memorial to remember those lost.

"This area has been a public area for many, many years," Hewitt said.

"This is the first time that anything like this has ever happened or been reported.

"Daylesford is a place that does respect its history and this will become part of Daylesford's history."

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For now, the focus remains on supporting the community, particularly those who were first on the scene.

Victoria Police Senior Sergeant Simon Brand said the two local police officers who attended were receiving support.

"They're coping, it's a traumatic thing to process for them and they're in their processing phase about what actually happened," Brand said.

"They've supported the community, so now it's up to us to support them back."

A top-level investigation is underway in South Australia, where two police officers are accused of using a Taser and pepper spray to arrest a care home resident.

The two officers have been removed from operational duties while both an internal and criminal investigation are carried out.

The complaint was made to police after the man's family saw footage of the alleged incident.

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It's alleged police dragged a man, who is in his 60s and lives with Huntington's disease, from his care home.

Police confirmed in a statement a Taser and pepper spray were deployed during the altercation.

The officers allegedly used their knees to pin the man to the ground.

While the incident occurred 11 days ago on October 26, the complaint was made on Sunday.

A commissioner's inquiry was declared after Police Commissioner Grant Stevens and Deputy Police Commissioner Linda Williams watched the bodycam footage of the alleged incident.

A senior police officer and the Office of Public Integrity – an independent body – will oversee the inquiry.

"I think you can read from the response that there is a level of concern that justifies a commissioner's inquiry," Williams said.

"But I say this cautiously, there is an investigation that needs to be undertaken so that the full facts and statements and evidence can be obtained."

The man remains in hospital with minor injuries.

Williams said SA Police has a "rigorous training process" and a "rigorous oversight process" for the use of force.

"I'm confident that in the majority of cases, police officers exercise those authorities appropriately and the purpose of this inquiry is to have an understanding of what occurred and transpired on this occasion without pre-empting any outcome of an inquiry," she said.

In response to a question about whether police can use a Taser on an unarmed person, Williams said there is a "proportional use depending on the threat".

"The threat can be presented in different ways," Williams said.

"Sometimes it may be with a weapon or without a weapon.

"But there are circumstances that need to be taken into account as a police officer in that situation makes a risk assessment.

"So there are protocols around it but in terms of being able to say things have to be this way or that way that is very difficult to be able to prescribe."

A Sydney development group has been ordered to fix an apartment complex riddled with issues as the NSW government cracks down on non-compliant developers and construction companies.

Residents of the apartment complex on Eden Street in North Sydney have been dealing with black mould, damaged floorboards and leaking balconies since they were first sold in 2016.

Justine Butler bought an apartment only to find out her home was only approved for short-term accommodation.

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"There are people in this building with a lot more things to deal with but I guess I'm surprised this could happen," Butler told 9News.

Moore Development Group have been given until mid-December to comply with a rectification order issued by the NSW government and begin fixing the issues.

"It boils my blood, you can see first-hand what this place is like, it has been a living nightmare since it was finished," NSW Building Commissioner David Chandler said.

ZS Constructions, which has filed for bankruptcy, was responsible for the build and defects, according to a statement issued by Moore Development Group to 9News. 

The Eden Street apartment complex is one of 153 residential buildings being investigated by Project Interceve, an initiative launched by the NSW Building Commissioner to hold developers accountable for construction defects and issue them with "very significant" fines if they don't comply.

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The building body corporate has been pursuing legal action against the developers in relation to the building defects since 2019, but Chandler says the quickest way to get results is to report defects directly to the state government.

"We will hold every developer accountable to ensure they deliver the products so many people invest their hard-earned money into," Industry Trade Minister Anoulack Chanthivong told 9News.

Home ownership is falling further out of reach for Australians after today's interest rates increase, with a new survey finding the income required to buy the average house is far more than most workers earn.

According to Finder, the minimum wage required to comfortably afford a mortgage for the average house – which costs $926,899 – with the cash rate now at 4.35 per cent is $182,000.

That's almost three times the median income which, according to the Australian Bureau of Statistics, was $65,000 last year.

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The required salary falls to just under $130,000 to buy the average $659,130 apartment, still well out of reach for a single-income household.

Today's rate rise means borrowers with a $590,000 mortgage will be paying an extra $1345 a month compared to April last year.

"That's a huge amount of extra money to be spending on your mortgage, especially when the cost of almost everything else is also going up," Graham Cooke, Finder's head of consumer research, said, adding mortgage holders were "already on the ropes".

While the increase was largely expected, it has led to significant criticism due to the disproportionate impact it will have on low-income earners.

"The RBA's decision to lift the cash rate to 4.35 per cent will hurt people with low incomes the most," Australian Council of Social Service CEO Cassandra Goldie said.

"The worthy goal of reducing inflation must not come at the expense of jobs and incomes…

"Instead of relying solely on the blunt tool of rate rises, the government must step in to aid the RBA with measures to tackle inflation at its roots.

"This should include working with states and territories to curb soaring rents and additional measures to bring down energy bills for those who can least afford it."

Higher-than-expected inflation figures late last month had economists tipping today's rates rise, but subsequent data revealed petrol prices – which are set internationally and not impacted by interest rates – and increasing mortgages were driving the higher cost of living.

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The Housing Industry Association said the RBA should have waited longer before pulling the trigger on its 13th hike since last May, saying economic growth was already slowing.

"The fastest increase in the cash rate in a generation is the primary cause of these poor results in indicators of future growth," chief economist Tim Reardon said.

"The RBA's monetary policy tightening is yet to adversely impact the lagging indicators of economic activity like unemployment or inflation.

"There were very long lags in this cycle due to the strength of the economy at the start of the RBA's rate rising cycle in the first half of 2022."

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Reardon said the decision would lead to fewer homes being built, despite the need for more supply amid the housing crisis.

"Today's rate rise is unnecessary and will cause further contraction in new home building, constraining the supply of new homes," he said.

And that, he said, would make the average mortgage even less affordable.

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