IRAQ (Agencies) - At least 10 people have been killed in two bomb attacks targeting security forces in Iraq. A roadside bomb killed six Kurdish peshmerga fighters in Khanaqin town in Diyala province, north-east of Baghdad. Diyala has been the focus of a US-led offensive against al-Qaeda fighters. Khanaqin is the centre of a power struggle between Kurds and Arabs. Separately, a bomb in eastern Baghdad killed three Iraqi policemen and a Sunni militiaman opposed to al-Qaeda.  At least eight people were hurt in the blast, which targeted a checkpoint, according to security officials. While, an Iraqi Kurdish official told AFP news agency the blast in Khanaqin targeted a patrol on the eastern outskirts of the town, near the Iranian border.  The commander of peshmerga forces in Khanaqin and his son were among those killed, Mahmud Singawi told the agency. Khanaqin has a mixed population of Kurds and Arabs. The Iraqi army has been trying to extend its control over the city, pitting it against peshmerga fighters based there. In the surrounding province of Diyala, US and Iraqi government forces have been leading an offensive against Sunni militant groups allied to al-Qaeda. Bomb attacks and assassinations remain commonplace in Iraq, although the country is generally less violent now than a year ago.  Meanwhile, Iraqi police on Sunday arrested five men suspected of involvement in the brutal kidnapping and killing of a four-member team from the Al-Sharqiya television channel, police said. Two suspects were arrested as they were driving a car which was allegedly used in the abduction, said Brigadier General Khalid Abdelsattar, spokesman for the police in Nineveh, the province surrounding the northern city of Mosul where the incident occurred. He said police also found a gun with the two suspects. Abdelsattar said three other suspects were arrested in the city's Al-Thawra neighbourhood. "We are interrogating them," he added. The arrests came just hours after Prime Minister Nuri al-Maliki ordered an inquiry into the incident. "We offer our condolences to the martyrs' families and Al-Sharqiya channel at this painful time," Maliki said in a statement. "We condemn all attacks that target the Iraqi media and violate the rights and the freedom of journalists. "This crime will not prevent our security forces from enforcing the law and security in Nineveh and in all Iraq's provinces," he added.