Belfast's Lord Mayor Alex Maskey last night called on sectarian rioters to "wise up and grow up" after violence erupted at several flashpoints just hours after an Old Firm match.
A paramedic and two police officers were injured when trouble broke out at a number of interfaces in the north and east of the city on Sunday after Rangers' victory over rivals Celtic.
Disturbances erupted on the Limestone Road and an ambulance was attacked with bricks and stones during disorder in the Whitewell area. A crew member sustained an eye injury when a window in the ambulance was smashed by rioters.
Gabriel McClean of the Ambulance Service hit out at the latest incident.
"We are here to serve all the community, all of the time. That's all we want to do," he said.
Two police officers were hurt during the riots with one sustaining a leg injury and the other a blow to the head.
The British army later defused two pipe bombs at the back of a house in Strand Walk, in the nationalist Short Strand area of east Belfast.
Trouble also flared in Co Armagh and a woman was treated in hospital for a mouth injury during trouble in the Market Street area of Lurgan.
Both football clubs declined to comment on the trouble, saying they have received no details from the Police Service of Northern Ireland. But politicians from all sides condemned those behind the trouble.
Appealing to those involved, Belfast Lord Mayor, Sinn Féin's Alex Maskey said: "Wise up and grow up."
"People should be able to enjoy football, not use it as an excuse to get drunk and hurl sectarian abuse."
Ulster Unionist Fred Cobain called on publicans to reconsider screening Old Firm matches.
"The aftermath is dreadful and the incidents that occur after the matches is mostly down to alcohol," he said.
