In September 1975, a group of 44 civilians, including armed supporters of the Timorese Democratic Union (UDT), commandeered an RAAF Caribou, "A4-140", on the ground at Baucau Airport in the then Portuguese Timor, which was in the middle of a civil war. The Caribou had landed at Baucau on a humanitarian mission for the International Committee of the Red Cross. The civilians demanded that the RAAF crew members fly them to Darwin Airport (also RAAF Base Darwin) in Australia, which they did. After the Caribou arrived there, the Australian government detained the civilians for a short period, and then granted refugee visas to all of them. "The Guardian" later described "A4-140" as "the only RAAF plane ever hijacked", and the incident as "one of the more remarkable stories in Australia's military and immigration history".