April 28 (Reuters) - Iraqi security forces opened fire at a drone flying over Baghdad’s heavily fortified Green Zone, security sources said on Tuesday, adding that it was likely being used for surveillance.

The drone managed to escape after coming under fire, the sources said, with no immediate reports of damage or casualties.

The Green Zone houses government buildings and foreign missions, including the U.S. embassy, which has come under rocket and drone attacks in recent weeks following the U.S. and Israeli strikes on Iran.

(Reporting by Ahmed RasheedEditing by Gareth Jones)