I have heard that the looters are not limited to Jamaicans and Pakistanis, although apparently Jamaicans were the first to riot. Some FReepers had speculated that Turks may be involved as well, but, according to this, in these riots the London Turks are playing the part played by L.A. Koreans in the Rodney King riots: http://www.nationalreview.com/corner/274058/how-widespread-was-london-rioting-andrew-stuttaford
It's not impossible for them to play both sides: some staying to protect their own, while others go out and play.
Few iif any Pakistanis, in fact. These are not Muslim neighbourhoods.