London riots: Police urge calm in Tottenham
7 August 2011 Last updated at 01:33 BST
Police are calling for calm in Tottenham in north London, where a tense standoff is taking place.
Earlier three police cars, a bus and a building were set alight following a protest against the fatal shooting of 29-year-old Mark Duggan on Thursday.
Cdr Stephen Watson from the Metropolitan Police has urged people to avoid the area.