Two men have been stabbed to death and two others injured in separate attacks across London.
A man in his 20s was pronounced dead at the scene in Bromley Road, Walthamstow, at about 19:15 GMT on Thursday.
In an unrelated attack a man in his 30s was found dead near Scratchwood Park in Barnet at 20:27. Another victim, in his 20s, also sustained stab wounds.
An arrest has been made in connection with the earlier stabbing but police have not given any further details.
The Metropolitan Police said a man in his 20s who was also found injured in Walthamstow had been taken to hospital with non life-threatening injuries.