Two suicide car bombers and a car bomb struck Kurdish security forces in Iraq's northern city of Kirkuk on Wednesday, killing at least two and wounding more than 29, a local police source said.

The attacks occurred in the morning when a suicide bomber rammed his explosive-laden car into the entrance of the office of the Patriotic Union of Kurdistan, a Kurdish party headed by Iraqi President Jalal Talabani, in central city of Kikruk, some 250 km north of the Iraqi capital of Baghdad, the source told Xinhua on condition of anonymity.

Initial police report put the toll at 18 wounded, most of them were Kurdish security guards, named Peshmerga, the source said, adding that the blast destroyed part of the office building, and a civil defense team are working at the site to look for more victims.

Meanwhile, a car bomb detonated near a Kurdish security patrol in the southwestern part of Kirkuk, leaving at least one security member killed and six others wounded.

Also in the morning, another suicide car bomber struck a checkpoint at the entrance of a Kurdish security base near the town of Daquq, some 50 km south of Kirkuk, killing a Peshmerga member and wounding four others and a civilian, the source said.

The toll could rise as many of the victims were evacuated by ambulances and civilian cars to several hospitals and medical centers in the city.

The ethnically mix province of Kirkuk and its capital Kirkuk City, some 250 km north of Baghdad, are part of the disputed areas between the Kurds and both Arabs and Turkomans.