A wave of attacks in and around Baghdad and in northern Iraq killed 17 people and wounded dozens others on Tuesday, shattering a relative calm after a spate of deadly attacks last week.

A wave of attacks in and around Baghdad and in northern Iraq killed 17 people and wounded dozens others on Tuesday, shattering a relative calm after a spate of deadly attacks last week.

Tuesday's deadliest blasts struck an Iraqi army checkpoint south of Baghdad, a military base north of the capital, and a mostly Shiite neighborhood in the city's north, AFP quoted security and medical officials as saying.

In the bloodiest attack, six people were killed when a car bomb was detonated near an army camp in the town of Taji, 25 kilometres (15 miles) north of Baghdad, an army officer and a medical official said.

At least 20 other people were wounded.

South of the capital in the town of Mahmudiyah, at least five people were killed and 14 others wounded by a suicide car bomb, officials said.

Mahmudiyah lies within a mixed region known as the "Triangle of Death" because of the frequency of insurgent attacks during the worst of Iraq's insurgency in the wake of the 2003 US-led invasion.

A car bomb near a market in the north Baghdad neighborhood of Shuala killed five people and wounded 12, while four shootings and bombings in Diyala province left 1 militant dead and at least six other people hurt.

Six Kurdish security officers were also wounded by a roadside bomb in the northern town of Tuz Khurmatu.