Police had bricks thrown at them after a 16-year-old girl was hit and killed by a marked police car in Newcastle.
Northumbria Police made several arrests after trouble flared following the death of Hayley Adamson in the city's Denton Road, late on Monday night.
At one point a 23-year-old man had to be subdued with a Taser stun gun.
Ch Supt Paul Weir said emotions were "running high" in the area and police had met members of the community twice on Tuesday to appeal for calm.
An Independent Police Complaints Commission (IPCC) spokesman said the driver of the marked police car was responding to the activation of his vehicle's automatic number plate recognition system, when Ms Adamson was struck as she crossed the road.
He said it was unclear whether the car's siren and warning lights were on.
http://news.bbc.co.uk/1/hi/england/tyne/7410441.stm