Armed men on Friday shot dead two policemen when they were travelling in their car in Baquba, city north of Baghdad which has seen an increase attacks in the last few days.
Two truck drivers lost their lives when their convoy hit a roadside bomb near al-Rashad, also north of Baghdad, as it was headed towards an Iraqi military camp.
A senior Iraqi army officer and two civilians were gunned down in separate attacks in Dora, south of the capital.
Near Tikrit, the hometown of ousted president Saddam Hussein, armed men attacked an Iraqi military patrol, killing one soldier and wounding four.
A police officer and his friend were shot dead by armed men northeast of Baghdad, police said, while a civilian was killed in the northern town of Samarra during a clash between two groups.
A US military vehicle was damaged when it hit a roadside bomb in Falluja west of Baghdad, a US marine said. No casualties were immediately reported. Danes hurt
Elsewhere, two members of Denmark's 500-strong contingent in southern Iraq were lightly wounded when a roadside bomb exploded as they drove past, the Danish army said Friday.
The incident happened late on Thursday in a suburb of Basra, where the Danish troops are based. The soldiers were treated at the British military hospital in Basra, and later released.
Last week, a Danish army vehicle was damaged when a roadside bomb exploded in the same neighbourhood. Since their deployment in 2003, one Danish soldier was killed by friendly fire in August 2003.