Two pedestrians were hit,with one declared dead at the scene and the other suffering life-threatening injuries (Picture: Nine News)

One person has died and another is fighting for their life after a car swerved in Comic Con fans in Melbourne.

Fans standing outside the Supanova Comic Con at Melbourne Showgrounds were hit by a grey Toyota after it mounted the pavement at 5pm.

Two pedestrians were hit,with one declared dead at the scene and the other suffering life-threatening injuries.

A witness,Tom,told The Age: ‘I heard a screech and a guy (allegedly) mounted the kerb at an erratic speed,hit a couple people.’

The car reportedly did a U-turn and drove back down the street,stalled and a group of witnesses tried to apprehend them.

Tom said: ‘He was erratic. ‘I said,“you’re not going anywhere mate”.’

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Start your day informed with Metro's News Updates newsletter or get Breaking News alerts the moment it happens.The scene where a car struck two pedestrians,killing one and injuring another during the Supanova expo (Picture: AAPIMAGE)Tom’s wife is a paramedic who worked on one of the victims for 20 minutes before ambulances arrived.Melbourne Police said: ‘Major Collision Investigation Unit detectives are investigating a fatal collision in Ascot Vale this afternoon.‘Police have arrested a man who will be interviewed by police. The circumstances surrounding the collision are yet to be established and the investigation remains ongoing.’Get in touch with our news team by emailing us at .