Four people have been arrested following a stabbing that left a teenager critically injured.

On Monday four people were arrested on suspicion of attempted murder. They were taken to a north London police station before being released on bail until early December pending further enquiries.

The victim remains at central London hospital in a critical condition. Detectives continue to appeal for witnesses and information.

READ MORE: Teen in critical condition following stabbing outside takeaway shop in Northolt Road

On Friday police were called at around 5.10pm to reports of a man stabbed near to South Harrow Underground Station, outside Kebabish takeaway in Northolt Road, in Harrow.

Officers and London Ambulance Service attended and found a 19-year-old man suffering from a stab wound. At this stage, it is thought the victim was attacked by a group on men, all of whom are described as black and believed to be aged in their teens or 20s.

The victim had been riding his bicycle shortly before the stabbing. This bicycle was recovered near to the scene.

A 17-year-old male also sustained a minor laceration to his abdomen during the incident. He was taken to hospital for treatment and later discharged.