The US Military has urged service personnel to be vigilant after Islamic State (IS) hackers issued an online threat to approximately 100 of its soldiers.
Calling itself the Islamic State Hacking Division, the group posted information about members of the US Army, Navy and the Air Force, including photos, ranks, and addresses, on the internet and called its supporters to kill them.
The group said the targeted personnel had participated in missions against the organisation in Iraq, Syria and Yemen, as reported by ABC.
Islamic State Hacking Division said: "With the huge amount of data we have from various different servers and databases, we have decided to leak 100 addresses so that our brothers residing in America can deal with you.
"Now we have made it easy for you by giving you addresses, all you need to do is take the final step, so what are you waiting for?"
The US Department of Defense said the threat was unverified and would be investigated.
Meanwhile, US Marine Corps spokesman lieutenant colonel John Caldwell said in a statement: "Vigilance and force protection considerations remain a priority for commanders and their personnel.
"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."
While the IS-affiliate claimed that the information was obtained by hacking servers and databases, a US Military official told The New York Times that the data could be found in public records, residential address search sites and social media.
In addition, undisclosed US defence sources were quoted by The Times as saying that the list appeared to have been made from soldiers mentioned in news articles about airstrikes on the group.