A man was stabbed to death by a group of youths as he left a cinema with his girlfriend.
The 20-year-old died an hour after being stabbed in Romford at 4.30pm yesterday.
Witnesses told how the man's girlfriend knelt by his side and was screaming as others tried to revive him.
He was stabbed on the first floor car park at Brewery Leisure Centre in Romford as he and his partner were walking back to a car. He was taken to hospital but died an hour later.
Jodie Freeman, 22, who gave CPR added:
Police have arrested four men aged 14,15,17 and 19.