British Prime Minister David Cameron has announced he will extend US-style gang injunctions in Britain. He said, there was clear evidence that gangs had been at the heart of the recent violence in cities in the country. He said, he believed they had co-ordinated some of the attacks on police. The Prime Minister said gang injunctions, introduced in January in some areas would be extended to the rest of country, and would cover juveniles as well. The civil injunctions can bar individuals from consorting with gangs, wearing regalia or using the internet to organise meetings. Cameron said: Territorial, hierarchical and incredibly violent, the gangs are mostly composed of young boys, mainly from dysfunctional homes. They earn money through crime, particularly drugs, and are bound together by an imposed loyalty to an authoritarian gang leader. Cameron said he would also be drawing on the success of anti-gang initiatives in Boston, Los Angeles and Strathclyde in Scotland.Meanwhile, a man left in a critical condition after being attacked while trying to put out a fire during riots in the west london suburb of Ealing, has died. Scotland Yard said the 68 year old, died in hospital last night. The Metropolitan police said a murder investigation had been launched. Police said, four other deaths including a man found shot in a car in Croydon and three men hit by a car in Birmingham may be linked to the recent riots.