The Pentagon on Monday announced the names of the three Army reservists killed in the drone attack over the weekend on a U.S. base in Jordan near the border with Syria.

Pentagon deputy press secretary Sabrina Singh announced the names at a briefing Monday afternoon: Sgt. William Jerome Rivers, 46, of Carrollton, Georgia; Spc. Kennedy Ladon Sanders, 24, of Waycross, Georgia; and Spc. Breonna Alexsondria Moffett, 23, of Savannah, Georgia.

The three reservists were killed Sunday when a one-way unmanned aerial system hit their container housing units, where they were sleeping at the time. The working theory about how an enemy drone slipped past defenses at a U.S. base in Jordan is that American personnel mistook the enemy drone for one of their own returning from a surveillance mission, two U.S. officials confirmed Monday.

Source-ABC