 On 21 August 1992, a large group of about 1,200 civilian detainees released from the Bosnian Serb-run Trnopolje camp were being transported to Republic of Bosnia and Herzegovina-controlled territory in central Bosnia.After the convoy reached Mount Vlašić, about 200–250 men were selected and separated from the main group by a group of paramilitary policemen from Prijedor, the so-called "Intervention Squad", also known as "Mice" and "Red Berets", and crammed onto two buses.According to the survivor Medo Sivac (18 years old at the time), when the rest of the convoy left for Travnik, "they took everything valuable from us, jewelry, money, watches."