Ongoing disputes between the major parties – KDP and PUK – could complicate the formation of a new government.
Defence Ministry says it hit 34 targets of the outlawed group in north Iraq as Turkey arrests 176 suspects over assault.
More than 1,000 candidates, including 368 women, are vying for election to the 100-seat regional parliament.
Kurdish authorities say a Turkish drone strike killed several people, with reports that the strike targeted journalists.