NATO bombed what it claimed to be Yugoslav Army and Serbian police forces near the prison at 1:15 p.m. on 19 May killing four and wounding two civilians.[6] The prisoners spent the next two nights sleeping outside, but within the walls of the prison. On 21 May, prison guards ordered the prisoners to line up in the courtyard, however, the process was interrupted when NATO planes flew over.[3] Initially, the NATO claimed that the prison was a military barracks.[2]