The U.S. Central Command Twitter feed appeared to have been hacked on Monday by people claiming to be Islamic State sympathizers.The so-called Cyber Caliphate seized the account around 12:30 p.m. EST on Monday and sent a message reading, "AMERICAN SOLDIERS, WE ARE COMING, WATCH YOUR BACK. ISIS."The Twitter account was then suspended around 1:10 p.m. EST.The Twitter account published a list of generals and addresses associated with them, titled "Army General Officer Public Roster (by rank) 2 January 2014."Subsequent posts on the Centcom twitter account read, "Pentagon Networks Hacked! China Scenarios" and "Pentagon Networks Hacked. Korean Scenarios."The apparent infiltration came as President Barack Obama prepared to outline new proposals to protect the country's Internet systems from cybersecurity threats.Centcom, whose area of responsability covers Middle East, North Africa and Central Asia, is one of the six command structures of the U.S. military buildup spanning around the globe.