27/01/2016 10:16 AM AEDT | Updated 15/07/2016 12:51 PM AEST

Four Dead In Horror Car Crashes In Victoria And NSW

Nine News

Two people have died in Melbourne’s north-west after their car drove off a bridge; plunging more than 50 metres and exploding in a ball of flames. It was a horror night on the roads that claimed four lives in three separate accidents.

In Melbourne, police said two cars were speeding along the Western Ring Road at 1:30am when one driver lost control of his car and fell 55 metres off the bridge in Keilor East before it exploded on impact.

It’s estimated the cars were travelling at speeds of around 160km per hour and police said it was believed to be linked to an illegal drag racing gathering of up to 100 cars earlier in the evening at Campbellfield.

The car smashed through a 1.5 metre barrier before landing into the valley below, much to the horror of witnesses.

A witness told Macquarie Radio Network the accident sent a fireball up in to the air.

“I was driving to work at 1:30am and I was doing 100 kilometres per hour and these two cars come flying past me and gave me a fright," said the witness.

"It would have been 100 or 200 metres in front of me I saw one of the cars lose control and go over the railing. It burst into flames, it was surreal. It was like watching a movie."

The crash caused heavy traffic delays this morning with the southbound lanes of the Western Ring Road closed.

Police are now looking for two people in a silver 2003-2004 Ford sedan with P-plates, which is believed to have travelled from Campbellfield to the Western Ring Road.

The bridge, which crosses the Maribyrnong River, is 55 metres at its highest point; police estimate the car landed 100 metres away from the bridge where it exploded.

A second crash in Victoria overnight has resulted in the death of a woman who was the backseat passenger of a car that crashed into trees at Buangor in Victoria's west.

Police said the driver lost control after hitting a fox on the Western Highway at 10:30pm near Ararat. Three others were also injured in the crash.

In NSW, a man has been killed in a collision between a coal truck and car on the Appin Road south of Sydney, around 4:30am.

The crash occurred near Illawarra Road at Appin; motorists are being urged to avoid Appin Rd, which has been closed between Wollongong and the Appin township.