Violence has erupted on the streets of Northern Ireland, after more arrests were made in connection with the murder of two British soldiers.Republican rioters attacked police with petrol bombs in Lurgan, Country Armagh. Officers there had earlier detained a prominent Republican for questioning over the killing of the soldiers outside their base in Antrim. Former IRA member Colin Duffy has distanced himself from mainstream Republicans since power-sharing in the province. Reports of his arrest prompted scenes that many thought belonged to its past. The soldiers’ murder, followed by the killing of a police officer, shattered a relative calm that has prevailed since a 1998 peace deal ended decades of violence. Splinter groups of the IRA, which formally ended its military campaign against British control of Northern Ireland in 2005, said they were behind the deadly attacks. At least four people have now been arrested over the soldiers’ murders. Several others are being held in connection with the policeman’s death. Echoing calls for peace from Northern Ireland’s different communities, a vigil was held outside the military base where this month’s bloodshed began.