BELGRADE, Serbia (AP) — The bodies of two Serbian embassy staffers believed killed in U.S. airstrikes last week on an Islamic State group camp in western Libya have been flown back home.

The remains of communications officer Sladjana Stankovic and driver Jovica Stepic landed in Belgrade Tuesday on a regular flight from Turkey, to where they had previously been transferred from Libya.

Foreign Minister Ivica Dacic stood in silence as the coffins draped in Serbian flags were taken out of the plane at the Belgrade airport.

The two were killed Friday while held hostage at the site targeted in the American bombing. They were abducted in November after their diplomatic convoy came under fire near the coastal Libyan city of Sabratha.

Serbia has sought an explanation from the U.S. about the airstrikes.