US Central Command's Twitter account appears
to have been hacked by a group claiming to back
Islamic State.
One message said: "American soldiers, we are
coming, watch your back."
It was signed by Isis, another name for the
Islamic State. Some internal military documents
also appeared on the Centcom Twitter feed.
US Centcom told the BBC it was preparing a
statement. The hack happened as President
Barack Obama prepared a speech on
cybersecurity.
Some of the documents posted appeared to list
names and phone numbers of members of the
military as well as PowerPoint slides and maps.
The Centcom YouTube account was also hacked.
American and coalition war planes have been
undertaking air strikes against IS in Iraq and
Syria.

Real mess it is