Police later said a 17-year-old was arrested during the east Belfast trouble. Two other men, aged 70 and 26 were detained in a separate incident connected to disorder which followed a flag protest in the Great Victoria Street area.
The Police Service of Northern Ireland (PSNI) Chief Constable revealed his commanders on the ground were revising their tactics, but said sweeping protesters off the streets was not a realistic option:
Even when the PSNI was 12,000 strong it would not have been possible to take such a rigid approach towards protests. Our approach has always been to be measured and responsible.
We have simply to put public safety first.
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.