Protestant youths threw petrol bombs, police in Northern Ireland, injuring at least 27 limits of traditional protest in the fourth night, the White House expressing "deep concern" violence.
Regional parliaments, recalling its summer recess, due to meet on Tuesday to discuss how to restore order.
Police said they react with water cannons and at least one in Belfast baton rounds. Protest events reported in at least five other UK cities and towns across the province.
Thousands of pro-British Protestants march, every summer, often as a Catholic flashpoint of sectarian violence, many people prefer the Irish unity march was a provocation.
Protestant marchers unhappy because the authorities ruled that they could not walk along the road separating the two communities extends start throwing bricks and bottles on Friday.
The White House said U.S. Vice President Joe Biden said his "deep concern" about the violence (Monday) with the leaders of Northern Ireland during a call.
Police service district council appealed for help to end the conflict.
"Today is a calm, then, and again promises meeting to seek a political solution," the force's police chief Matt Bage Te said.
"There are already too many police officers were injured and young people facing a prison sentence for the other, is acceptable."
Police say at least six home-made explosive devices and petrol bombs on Monday night, police in Belfast eastern thrown.
Catholic demonstrators clashed with police in Adroyne areas of the city, in a protest against the power of supplement. Where cars were set on fire in Belfast clashes in northern.
Towns Newtownabbey, Antrim, Dungannon, Portadown Londonderry is also reported that protests and other events.
Most of the 1998 peace agreement ended decades of sectarian conflict in the British provinces, but the trouble is still broke, particularly around Orange parade, which marks the 1690 Protestant victory over Catholic king.
Police said they had brought from England hundreds of reinforcements. 60 people were arrested and 71 police officers injured since the latest conflict began.
 



Other News:
Northern Ireland parliament recalled as violence continues
Swift approval sought for Midwest oil pipeline
U.S. regulator targets Apollo, Aviva insurance deal: WSJ
Russia's Putin says U.S. ties more important than Snowden
Russia's Putin wants Snowden to go, but asylum not ruled out
Japan gets Net campaign, but not savvy candidates
Judge to rule on dismissing most serious charge in U.S. WikiLeaks trial
Calif. calm amid increased policing at protests