their buses being turned into burning barricades or occasionally being bombed. Four Ulsterbus employees were killed in the 1972 Bloody Friday bombings when an IRA bomb exploded at the Oxford Street bus station. In total, 17 employees from both Ulsterbus and Citybus were killed during The Troubles, with 1,484 buses in total being maliciously destroyed from 1964 to the signing of the Good Friday Agreement in 1998.