“The shelling started at 2:00 a.m. (2200 GMT) and ended at 1:00 p.m. (0900 GMT),” said Ruzgar Qrani, chief of security in Sinkser district, 165 km (100 miles) north east of Sulaimaniya, the largest city in Kurd-controlled northern Iraq.
Militants from minority Kurdish groups from Iran and Turkey have based themselves in northern Iraq and there have been a number of previous claims by Iraqi officials that their neighbours have conducted cross-border attacks.
Iranian officials were unavailable for comment.