on october 4, 1984, gpk launched its first action by bombing one of bca's headquarter in glodok, followed by similar actions in bca's branches on gajah mada and pecenongan, causing two deaths. after investigations, police found out that the perpetrators of this act were muhammad jayadi, chairul yunus, tasrif tuasikal, hasnul arifin. jayadi was member of the gpk, and sentenced to 15 years in prison. the case also resulted in the imprisoning of several members of petition of fifty, including hm sanusi, am fatwa, dan hr dharsono.