OSCE says its drone fired at in Ukraine, U.S. blames rebels

VIENNA (Reuters) - European security watchdog OSCE said numerous anti-aircraft rounds were fired at one of its drones monitoring a shaky truce in eastern Ukraine, and the United States blamed pro-Russian rebels for Sunday's incident.

The unmanned aerial vehicle - deployed to help monitor the ceasefire between government forces and separatists - was not hit and it later landed safely, the Organization for Security and Cooperation in Europe (OSCE) said on Monday.