Water cannon have been used after rioting broke out for a fifth night in east Belfast.
The disorder began close to the Short Strand area on Monday as loyalists returned from a protest at the city hall.
Police were attacked with petrol bombs and bricks while separating rival groups.
Protests have been held since councillors voted to limit the days that the union flag flies over city hall.
Petrol bombs, fireworks and other missiles were also thrown at police during rioting on Robbs Road in Dundonald on Monday evening. A car was set on fire in Bute Park.
Sixty-two officers have been injured since the protests began.
Councillors are meeting on Monday evening for the first time since the vote was taken on 3 December.
A large security operation was put in place around Belfast City Hall before the meeting. A protest was held outside the hall, but the BBC reports it passed off peacefully.
On Sunday night, a protest took place near the Short Strand area of Belfast. Barriers and bottles were later thrown at police.