A shopkeeper was murdered in a "horrific and frenzied" attack in a shopping precinct by more than 20 armed teenagers, police say.
Mr Huang Chen was battered with a spade, tree branch and metal pipes
Mi Gao Huang Chen, 41, was battered to death in front of his girlfriend with a spade, tree branch and metal pipes in Scholes, Wigan, on Saturday night.
Police have arrested 17 teenagers on suspicion of assault and violent disorder, including a girl of 14.
Mr Huang Chen, known locally as Michael, ran the Superb Hut takeaway.
Residents say a gang of teenagers have plagued their community with anti-social behaviour.
Mr Huang Chen, who was from China, lived at Towcester Close in the Ancoats area of Manchester.
Police say the attack on him lasted up to 15 minutes. He suffered massive head injuries and died in Hope Hospital, Salford, on Thursday.
Det Ch Insp Steve Crimmins, leading the investigation, said: "It is quite frightening really, it was a frenzied attack. It was horrific and sickening.
"There have been ongoing problems in the area. There was a heightened police presence prior to the incident.
"There's been general nuisance that you associate with large groups of youths, in essence rowdiness and criminal damage.
"For some reason it has escalated out of all proportion and a man has lost his life."