Knife fight breaks out inside Uber after young man is pursued by rival gang - London, England

Terrifying video shows a London Uber driver being caught up in a brutal knife fight as masked knife-wielding attackers try to kill one of his passengers.

At the start of the footage, the taxi driver is seen waving goodbye to three jolly-looking men who had been riding in his taxi before saying, 'I'm going home now'.

Seconds after the trio leave the taxi, a Mercedes pulls up behind and at least three men jump out.

A scuffle breaks out as the taxi driver begins to slowly reverse away. After about 10 seconds, one of the men who was previously in the cab - wearing a light blue t-shirt and a beanie - suddenly pulls open the rear left door and jumps inside.

He is being pursued by an attacker wearing a black hoodie and a red mask, who smashes the taxi's window with a hammer before another man - with his face also covered - stabs him with a large knife.

The terrified man inside the cab pleads 'uncle, drive' as he is repeatedly stabbed through both windows by the three attacks - with blood pooling on his shirt.

Several seconds follow where the driver appears to be frozen in terror, before he begins moving away while the stabbing victim wrestles his attackers off him.

The man inspects his injuries, looking through the back window, he notices the Mercedes is still pursuing then gives up the chase shortly after.