Iranian Tasnim news agency reported on Wednesday that Iran's Islamic Revolutionary Guards Corp (IRGC) had targeted positions of what it described as terrorist locations in 's Erbil.
Iraqi Kurdish media reported that an artillery shell had landed in a village in the Sidekan area near the Iranian border, around 60 miles (100 km) northeast of Erbil.
"Headquarters of terrorist groups in Iraq's northern region, including the Democratic Party of Iranian Kurdistan, have been targeted in the past by the Revolutionary Guards on several occasions," Tasnim added.
"No casualties have been reported so far," state media said.
Iran's Tasnim news agency said the Guards have previously targeted Iranian Kurdish militants based in northern Iraq.
IRGC said in March it had targeted Israeli "strategic centers" in Iraq's northern Kurdish regional capital of Erbil, state media reported.
The Iraqi Kurdish regional government said the attack in March only targeted civilian residential areas, not sites belonging to foreign countries, and called on the international community to carry out an investigation.