This is the terrifying moment four revellers were stabbed as vicious thugs beat each other with chairs and metal railings outside a nightclub.

The mass brawl erupted outside Analog in Bristol at 4.20am on Saturday.

Two men have been arrested but most of the thugs got away before police arrived.

This is the terrifying moment four revellers were stabbed as vicious thugs beat each other with chairs and metal railings outside a nightclub

The mass brawl erupted outside Analog in Bristol at 4.20am on Saturday

A witness told The Tab: 'When the police and ambulances arrived there were people trying to fight the police and take the paramedics from the people who were lying still on the ground.'

'It was quite distressing to watch as people had been lying on the ground dead still for a long time but it didn't stop them kicking and stamping on them'.

A spokesman for Avon and Somerset police said four people suffered stab wounds and were taken to hospital for treatment.

They are now investigating what happened by studying footage of the brawl and speaking to witnesses.

It is not clear why the fight started.

Two men have been arrested but most of the thugs got away before police arrived