Fifteen police officers have been injured in a second night of serious disorder in Belfast.
Three were taken to hospital during trouble that saw rioters throw 15 petrol bombs at police lines in the Carlisle Circus area in the north of the city.
Officers used water cannon and fired six baton rounds at the crowds as troubled flared on Monday night.
Rioters also hurled stones, bottles, fireworks and rocks and hijacked a van in Denmark Street before pushing it towards police lines.
The extent of the injuries sustained by the police officers taken to hospital is not yet known.
Terry Spence, chairman of the Northern Ireland Police Federation, which represents rank and file officers, said: "Their bravery and courage is in stark contrast to that of the cowardly thugs responsible for trying to murder them."
The latest disorder came after 47 Police Service of Northern Ireland officers were injured on Sunday night during riots linked to a republican parade nearby and a loyalist protest.