There was a rise in sectarian killings during the truce, which 'officially' lasted until February 1976. Loyalists, fearing they were about to be forsaken by the British government and forced into a united Ireland, increased their attacks on Irish Catholics/nationalists. Loyalists killed 120 Catholics in 1975, the vast majority civilians. They hoped to force the IRA to retaliate and thus end the truce. Some IRA units concentrated on tackling the loyalists. The fall-off of regular operations had caused unruliness within the IRA and some members, with or without permission from higher up, engaged in tit-for-tat killings. Irish National Liberation Army (INLA) members, and current or former members of the Official IRA, were also involved. According to a police intelligence report, the Provisional IRA leadership reprimanded its South Armagh Brigade for carrying out sectarian killings.