KABUL — Two members of the US-led military coalition were killed Tuesday by a man wearing an Afghan police uniform in southern Afghanistan, an official said. The killings are the latest in a series of insider attacks that have sown distrust between coalition and Afghan forces.

An Afghan official said the ‘‘green-on-blue’’ attack happened during a joint patrol in Girishk in southern Helmand Province. The killer managed to escape, said the official, who spoke by phone on condition that he remain anonymous.