Sitting at Fortnum and Mason Heathrow T5 when a man runs past stabbing himself in the head - security has contained the situation
— Neerav Valiram (@neeravval) December 16, 2015

The Guardian reported that airline employees disarmed the man before airport security, police and paramedics had arrived.
Heathrow spokesman said it was believed the man took the knife from a shop in a departure area of the terminal after security checks and that "it would not have been a really sharp object."
Police said they were called to a shopping area at Heathrow's Terminal 5 at around 17:45 local time.
The man was then taken to hospital with non-life threatening injuries.

