Bomb attacks against the Iraqi army in the country's north killed 12 people on Monday, most of them soldiers, officers and doctors said.
A suicide car bomber attacked an army patrol in the city of Mosul, killing 12 people and wounding 16, while a roadside bomb wounded a soldier and a civilian near the city.
Security forces are frequently targeted by militants opposed to the Iraqi government.
The attacks came after gunmen assaulted two prisons in a bid to free inmates on Sunday night, killing 12 members of the security forces in clashes that raged all night.
Eighteen people were killed in other violence on Sunday.
Iraq has faced years of attacks by militants, but analysts say widespread discontent among members of its Sunni minority, which the government has failed to address, has fuelled the surge in unrest.