The US Marine Corps on Sunday urged "vigilance" among staff after the Islamic State group listed what it said were the names and addresses of military personnel,  urging supporters to kill them.
"Vigilance and force protection considerations remain a priority for commanders and their personnel," US Marine Corps Lieutenant Colonel John Caldwell said.
"It is recommended Marines and family members check their online/social footprint, ensuring privacy settings are adjusted to limit the amount of available personal information."