A machete attacker has been filmed raining down knife blows on a victim at Edgware Road underground station.
The attacker, dressed in grey sweatpants, a black hoodie and wearing a balaclava, can be seen with the enormous machete at the entrance to the station.
As an eyewitness films the vicious stabbing, the attacker can be seen making several attempts to swipe at someone laying on the ground.
After the attacker finally runs away, the camera moves in closer to reveal a man injured holding his side.
In the background, a staff member for Transport for London can be seen walking towards the injured victim.