Police have said that 29 officers were injured during sectarian clashes in east Belfast over the flying of the Union flag.
Chief Constable Matt Baggott said it was a difficult operation dealing with a large number of people determined to cause disorder and violence.
My colleagues brought the situation under control with exceptional courage and professionalism.
I know the vast majority of people will be grateful for their efforts. Police will continue to engage with all those committed to finding a solution to these issues
Twenty-nine police officers were injured during sectarian riots between republicans and loyalists in east Belfast today.
The union flag will be raised at dawn over Belfast City Hall for the first time since the dispute began last month.
Police were attacked for a third night, with frontline officers reportedly coming under gunfire as new loyalist trouble erupted in Belfast.