U.S. lawmakers confirmed Thursday that U.S. Central Command officials told them foreign adversaries are using commercially available tracking and location data to target American service members in war zones.

A bipartisan group of 14 lawmakers wrote a letter addressed to War Department Chief Information Officer Kirsten Davies that noted CENTCOM — the combatant command that oversees the Middle East — had informed Congress on April 14, tied to an earlier inquiry, that it “received multiple threat reports concerning adversary exploitation of commercial location data to target or surveil U.S. personnel in theater.”