Police attacked by masked men in Belfast
10 December 2012 Last updated at 22:43 GMT
An unmarked police car has been attacked by a masked gang of 15 men in east Belfast, then burnt out opposite Alliance Party MP Naomi Long's office.
The windows were smashed and a petrol bomb thrown in while an officer was still inside. He was not injured.
It happened on the Upper Newtownards Road at about 19:35 GMT. Police have said they are treating the attack as attempted murder.
There has also been rioting in the loyalist Village area of south Belfast.
Mark Simpson reports.