Washington - The US Central Command Twitter feed appeared to have been hacked on Monday by people claiming to be Islamic State sympathisers."In the name of Allah, the Most Gracious, the Most Merciful, the CyberCaliphate continues its CyberJihad," the Centcom Twitter feed said.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.