Thirty-nine people arrested following a stabbing in west London have been released from custody.
The Metropolitan Police said the victim was chased by a group of men and women from a nearby shop where the altercation began, while two knives were found close to the scene.
Officers said 20 males and 15 females, aged between 16 and 22, were released under investigation.
Two 18-year-old men and two boys aged 16 and 17 were released on bail.
Superintendent Mark Lawrence, said: "What appears to have been a minor argument has resulted in a man sustaining life-threatening injuries.
"He has been taken to hospital where he continues to receive treatment for his injuries.
"Whilst it is unusual for so many people to be arrested in the early stages of an investigation such as this, due to a lack of co-operation and the necessity of securing essential evidence following a serious assault, this action was appropriate."