Iraq's government is dropping barrel bombs and may also be targeting a hospital in its battle with militants in the conflict-hit city of Fallujah, Human Rights Watch alleged Tuesday. The Iraqi authorities denied the claims, which come with Baghdad locked in a months-long standoff with anti-government fighters in Fallujah amid a protracted surge in nationwide bloodshed, all of which is fuelling fears the country is slipping back into the all-out conflict of 2006 and 2007. The New York-based rights watchdog also said abuses committed by the powerful Islamic State of Iraq and the Levant jihadist group -- among the main militant organisations in Fallujah -- likely amounted to crimes against humanity. Iraqi army spokesmen did **t respond to AFP requests for comment, but HRW said in its report that the military denied targeting Fallujah's main hospital, and the prime minister's spokesman issued a statement on May 12 denying the use of barrel bombs.