A suicide car bomb near an army base in north Iraq killed at least four people on Monday, security officials said, the latest in an uptick in violence nationwide amid a political crisis.
The blast struck in the al-Muthanna area of Mosul, which lies 350 kilometres (220 miles) north of Baghdad, killing four people and wounding five others, according to security and medical officials.
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Also north of the capital, a roadside bomb killed a policeman and wounded two others in the disputed city of Kirkuk, while a police brigadier general was badly wounded by a magnetic "sticky bomb" attached to his car, officials said.
No organisation immediately claimed responsibility for the attacks, but Sunni militants including Al-Qaeda's front group often target security forces and officials in a bid to destabilise the government and push the country back towards the sectarian war that blighted it from 2005 to 2008.
The violence is the latest in a wave of unrest including car bombs and suicide attacks after weeks of rallies in Sunni-majority areas calling for the ouster of Iraqi Prime Minister Nuri al-Maliki.