"From 6:00 pm (1500 GMT) Saturday until this morning, Iranians fired on the villages of Khanawa, Totma, Marado, Sourkan and Nalia Rach, causing extensive damage to agricultural land and losses of livestock," said Azad Oussou.

The alleged incident came three days after Iranian forces on the border with Iraq's autonomous Kurdish region mistook Iraqi guards for fighters from the anti-Tehran Party of Free Life of Kurdistan (PJAK), resulting in armed clashes.

An Iraqi border guard officer was captured but later released.

According to Iran, PJAK rebels shelter in the mountainous border area.

The PJAK is closely allied with the Kurdistan Workers' Party, or PKK, which operates in Turkey and is listed as a "terrorist" group by Ankara and much of the international community.