Video emerges of shopper confronting armed man with bollard at Bondi Westfield

Video has emerged of a shopper confronting a man, who was armed with a knife, with a bollard on an escalator at a shopping centre in Sydney's east.

Police rushed to the scene about 3.45pm today. Eight people have been taken to hospital, five people have been confirmed killed and a another man has been shot dead by police. Officers say a single attacker is involved.

Video obtained by 9News appears to show a man wearing a rugby league jersey holding a knife as shoppers flee.

Video has emerged of a shopper confronting a man, who was armed with a knife, with a bollard on an escalator at a bondi junction westfield

More footage shows a bystander confronting the man by holding what appears to be a shopping centre bollard in front of him at the top of the escalator.

He is seen to be talking with the man in the jersey who has a knife in his hand.

The armed man appears to be walking halfway up the stationary escalator before the video ends.

Other witnesses have reported seeing an attempted citizen's arrest after the attack.

Video appeared to show a knife-wiedling man wearing a rugby league jersey.

An all-hands call-out was made by emergency services, who attended the scene quickly to takeover from shoppers.

Witnesses reported seeing an officer draw her gun on the man.

Two brothers have described how they helped a mother and her baby, both of whom had been stabbed."The baby got stabbed," one of the men told 9News.

"The mum got stabbed and the mum came over with the baby and threw it at me and (I) was holding the baby."

The man said he believed the baby would survive its injuries.

The husband of one of the injured told 9News he was relieved to see his wife at St Vincent's Hospital.

Multiple people have been stabbed at Bondi Junction in Sydney.

What we know so far

Five people have been killed at Westfield shopping centre at Bondi Junction in Sydney's eastern suburbs.
Eight people have been rushed to hospital in a critical condition after the attack just after 3pm.
A baby and a mother are among those reported to be injured.
The male attacker was shot dead just before 4pm by a female police officer.
Video appears to show a man wearing a rugby league jersey holding a knife as shoppers flee.
Mobile phone footage shows crowds within stairwells, with other shoppers saying they were evacuated to the roof
Shoppers helped victims as others cowered in shops for up to two hours.

READ ALL 9NEWS COVERAGE ON BONDI STABBING