Watch: UK Shocking moment knifeman attacks rival

Footage has emerged of a shocking street fight that saw a man stabbed as he was lying on the ground.

Horrific video shows a group of onlookers trying to wrench a knife off a man while another person lies bloodied on the ground.

But the attacker broke away and stabbed his victim again before the knife was finally wrestled off him.

The video ends with an onlooker dropping the huge knife on the floor after a man was restrained.