Two police cars were set on fire in northern London on Saturday night amid a protest over the fatal shooting of a man by police, Xinhua reported.
A shop and a double-decker were also been set on fire. Police have been attacked with bottles and other missiles.
Earlier in the evening, around 120 protesters gathered outside the police station of Tottenham, a suburb area of north London, demanding "justice" for a man shot dead by police on Thursday. The 29-year-old father of four kids was named as Mark Duggan locally.
Duggan had been travelling in a minicab on Thursday and was gunned down after an apparent exchange of fire.
Saturday's protest turned violent later when about 300 people have gathered at the disturbance scene, according to Sky News.
No injuries or deaths were reported so far.
"One was set alight and one was pushed into the middle of the high road," said a Metropolitan Police spokesman, adding that "the officers were not in the vehicles and were unhurt."
Local resident David Akinsanya, 46, later said both the two police cars were set on fire. He also said several shop windows were smashed.