stabbed at a London shopping centre packed with thousands of families and children on their school holidays.
The attack came amid increased security across the capital after a man went on a knife rampage in Russell Square, killing an American woman and injuring five others.
Witnesses said the attack happened on the ground floor of Westfield London, with two men seen running away from the scene.
Two men have been arrested in connection with the incident.
Westfield London is the second-largest shopping centre in the UK and the biggest in London.
It was partly closed as investigations into the incident continued on Friday afternoon.