A man has been killed in a double stabbing in north London that has left another man in hospital.
The attack took place in Camden High Street at about 23:15 BST on Thursday.
A man, whose age has not been released, was found with a stab wound and given first aid but was pronounced dead at the scene.
The Met Police said a second man, in his mid-20s, was also found suffering from a stab wound and was taken to hospital. No arrests have been made.
An eyewitness said the fatally injured victim was attacked by a gang before his killer ran off to the Tube station.
His family have not yet been informed of his death and the second man is said to be in a stable condition, a Met spokesman said, as he issued an appeal for witnesses.
The scene has been cordoned off and the High Street has been closed to traffic.
A section 60 order, giving police additional stop and search powers, has been authorised for the London Borough of Camden until 14:30 on Friday.
Chief Supt Raj Kohli, from Camden Police, said: "We are taking action across the borough to keep everyone safe."
He added: "I understand that a number of people believed to be known to the victim were present after the attack.
"I would urge them to come forward and speak to investigators as soon as possible with what they know and saw."
The latest killing comes after a 24-year-old man was shot dead in nearby Kentish Town on Sunday night.
Less than a mile away on the same day, a 22-year-old woman died after being stabbed in unconnected incident.