"What we don't need is for our resources to be diverted by groups of people, some of whom having been drinking," he said. "We do not want to see more violence on our streets."
Still, perhaps in a sign of the public uncertainty, sales of personal defense weapons including baseball bats -- in a country not known for playing baseball -- and nun chucks have skyrocketed on the British version of Amazon.com. Many customers are presumably still waiting for delivery as the riot continues.
ABC News' Miguel Marquez, Angus Hines and Josh Haskell contributed to this report.