Four US Air Force personnel had a miracle escape after their jets collided at an air show at a base in Idaho.

In a string of social media posts, the Mountain Home Air Force Base confirmed the accident at the Gunfighter Skies air show in front of crowds overnight.

Social media vision showed the pair of fighter planes crashing together mid-air before all four people ejected and triggered their parachutes.

LIVE UPDATES: Trump says 'clock is ticking' for Iran

"The aircrew involved in the incident are in a stable condition," one post read.

A fire triggered by the crash was also safely contained, the base confirmed.

The base had been locked down after the incident, but has since been reopened to allow guests to leave.

READ MORE: WHO urges borders to stay open as super-rare virus variant kills dozens

The collision involved two US Navy EA18-G Growlers from the Electronic Attack Squadron 129 in Whidbey Island, Washington, said Commander Amelia Umayam, spokesperson for Naval Air Forces, US Pacific Fleet.

Shane Ogden said he was filming the two jets as they came close together.

A video he captured shows the two aircraft appear to make contact and then spin in tandem as the crew members eject and their parachutes open.

READ MORE: New budget poll reveals mixed verdict after huge budget

The planes then fall together, exploding into a fireball upon impact as the crew members drop to the ground nearby.

"I was just filming thinking they were going to split apart and that happened and I filmed the rest," Ogden said in a text message. He said he left soon after the crash because he did not want to get in the way of emergency responders.

This year's Gunfighter Skies event was the first at the base since 2018, when a hang glider died in a crash during an air show performance.

With Associated Press.

NEVER MISS A STORY: Get your breaking news and exclusive stories first by following us across all platforms.

• Download the 9NEWS App here via Apple and Google Play
• Make 9News your preferred source on Google by ticking this box here
• Sign up to our breaking newsletter here

One of Ukraine's largest drone strikes on Russia has killed at least four people, including three near Moscow, and wounded a dozen others, local authorities say.

Debris fell on Russia's largest airport without causing damage before Ukrainian President Volodymyr Zelenskyy confirmed the drone strikes on Sunday, saying they were "entirely justified".

Russia has repeatedly launched similar attacks on Ukraine's capital and other cities during the war, and an expert said that the strikes appeared to be retaliation for recent Russian attacks on Kyiv.

READ MORE: Wife's heartbreaking tribute after Aussie dad killed in shark attack

Russian drone strikes on Ukraine overnight wounded eight people, Ukrainian authorities said.

In Ukraine's strikes on Russia, a woman was killed after a drone hit her home in Khimki, a Russian city just northwest of Moscow, and two men died in the village of Pogorelki, which is 10 kilometres north of the capital, according to local Governor Andrei Vorobyev.

Ukrainian drones had also damaged unspecified "infrastructure" and several high-rise buildings, Vorobyev said on social media.

One man was killed after a drone struck a truck in the Belgorod region, which borders Ukraine, according to local authorities.

In Moscow itself, at least 12 people were wounded in the night-time strike, mostly near the entrance to the city's oil refinery, Mayor Sergei Sobyanin reported. Sobyanin reported that the "technology" of the refinery hadn't been damaged.

Russia's largest airport — Moscow's Sheremetyevo — said that drone debris had fallen on its grounds without causing damage or affecting flights.

READ MORE: 'Help me': Aaron woke to the sound of screams

Russian defences shot down 81 drones headed for Moscow overnight, state agency Tass reported, citing Sobyanin, marking one of the largest attacks on the city since Russia launched a full-scale invasion of Ukraine on February 24, 2022.

Russian air defences destroyed 556 drones over Russia overnight, the country's defence ministry said Sunday morning. Shortly after midday local time, it reported that more than 1000 drones had been shot down or jammed in the previous 24 hours.

Zelenskyy said that the drones had flown more than 500 kilometres from Ukrainian territory, and that Ukraine was "overcoming" Russian air defence systems concentrated in and around the capital.

"Our responses to Russia's prolongation of the war and attacks on our cities and communities are entirely justified. This time, Ukrainian long-distance sanctions have reached the Moscow region, and we are clearly telling the Russians: their state must end its war," Zelenskyy said.

READ MORE: Brayden always 'lit up the room'. He was dead before he reached hospital

Revenge for Russian attacks, expert says

Nigel Gould Davies, senior fellow for Russia and Eurasia at the International Institute for Strategic Studies, a London-based think tank, said that Ukraine's large-scale attack appeared to be "the retaliation or revenge that President Zelenskyy promised after the fierce attacks that Russia carried out on Kyiv."

Those strikes came immediately after the end of a brief ceasefire that allowed Russia to hold its annual Victory Day parade on May 9 commemorating the Soviet victory over Nazi Germany during World War II.

"It brings home the fact Ukraine has the capacity to strike at very significant scale at or around the Russian capital," taking the war home to Russians in a way that would be "most unwelcome" to the Kremlin, Gould Davies told The Associated Press.

"There is no ongoing peace process to disrupt. What (the attack) is more likely to do is add to the darkening cloud of anxiety over Russia which has developed palpably over the last three or four months," he said.

He cited a combination of factors, including Russia's recent battlefield setbacks, a deteriorating economic situation at home, and the Kremlin's intensifying crackdown on the internet, including in Moscow and Russia's second-largest city, St Petersburg.

NEVER MISS A STORY: Get your breaking news and exclusive stories first by following us across all platforms.

• Download the 9NEWS App here via Apple and Google Play
• Make 9News your preferred source on Google by ticking this box here
• Sign up to our breaking newsletter here

Christopher Luxon said no sexual offender is a person of good character.

A suspected ACL injury leaves Warriors sweating, days after Luke Metcalf’s release.

Peters made the campaign announcement in Auckland before the Budget.

The pair were rescued from the water near Emu Point at about 2pm yesterday.