The government in Northern Ireland is being urged to do more to find a long-term solution to annual parading disputes.
The call comes from the police after unrest during parades by the pro-British Orange Order.
More than 80 police officers have been injured in rioting since the weekend.
On Monday nationalists attacked police with petrol bombs and other missiles.
The day before three police officers were shot and wounded.
Assistant Chief Constable Alistair Finlay said the
power-sharing administration of the pro-British Democratic Unionist Party and nationalist Sinn Fein must do more to prevent the violence and liaise closer with police.
But a junior minister has described the comments as “untrue and unfair”, arguing that a committee has been set up to examine new ways of handling the parades.
This was the first parade since Belfast took control of Northern Ireland’s policing and justice matters from London.