sentences:  A three-day standoff between security forces and militants at the apartment ended on 23 May, after the last Fatah al-Islam militant at that location blew himself up.Robert Fisk reported that while some of the group that had robbed the bank were cornered in the apartment block, others had holed up in the Nahr el-Bared camp north of the city.Under a 1969 Arab accord, the Lebanese army may not enter the Palestinian refugee camps.