A 20-year-old man was stabbed 10 times in a London street in the latest incident of knife violence in the capital.
He suffered significant blood loss, but survived the vicious, unprovoked attack, carried out late on Tuesday night, with non-life-threatening injuries, police said.
It is the latest in a string of stabbings involving young men, coming days after four people, including two teenagers, were stabbed to death in unrelated attacks across the city in the space of 24 hours.
The 20-year-old was chased by a group of teenagers, then ambushed and repeatedly stabbed as he knocked on a door of a residential street in Harrow, northwest London, for help.
The Metropolitan Police described the suspects as a group of black males in their late teens, who were wearing dark clothing, and appealed for witnesses to the attack in Eastway Crescent to come forward.