Baghdad, Jul 31 (IANS): Six people were killed and nine wounded in separate attacks in central and northern Iraq Tuesday, while al-Qaida group in Iraq claimed a wave of attacks that killed dozens the day before, police said.

Around Monday midnight, unidentified gunmen attacked a police checkpoint at the Kut city, some 170 km from Baghdad, killing three policemen and kidnapping another, reported Xinhua citing a police source.

In the early hours of Tuesday, gunmen using silenced weapons shot dead two policemen in the same city, the source said.

In the morning, a suicide car bomber struck the outer checkpoint of the compound of Saddam Hussein's presidential palaces, in Tikrit city, some 170 km from Baghdad, wounding seven policemen, a source said.

In northern Iraq, a policeman was killed and another wounded when a magnetic bomb attached to their car detonated in Kirkuk city, about 250 km from Baghdad, a local police source said.

Separately, another policeman was wounded when a magnetic bomb attached to his private car went off while he was driving on a main road in north of Kirkuk, the source said.