At least four people have been injured in violence in east Belfast tonight.
Sinn Féin say the trouble erupted after a number of houses in the republican Short Strand district were raided.
Police said their officers and troops were pelted with petrol bombs. "Bricks, bottles and other missiles were also thrown," a spokesman for the Police Service of Northern Ireland said.
A number of plastic bullets were fired by the security forces in a bid to quell the disturbances in the area.
Sinn Féin said at least four people, one of them a teenage girl, had been injured. One man was struck on the chest.
There has been trouble in the area since the weekend when loyalist and nationalist crowds clashed.
Sinn Fein MLA Mr Alex Maskey said protests about the police and army action had been lodged with the British and Irish governments. "Houses were raided. People protested and one thing led to another. People are very, very angry," he said.
Police said later they had fired three plastic bullets during what they described as "severe disturbances" in the republican Short Strand area.
Police and troops were "bombarded with missiles" including petrol bombs, acid bombs and ammonia bombs, said a spokesman.
The area is now reported to be tense but the violence has subsided.