A string of attacks across the western province of al-Anbar left 37 people dead, all but three of them members of the security forces, an Iraqi police source said on Wednesday.
Another 28 people were injured in the assaults, which were blamed on Sunni Muslim militants.
Fourteen police officers were found with their throats slit after a patrol was ambushed on a highway west of al-Anbar's capital Ramadi, some 110 km west of Baghdad.
Seven people, including four police, were killed when a suicide attacker rammed a vehicle packed with explosives into a checkpoint on the main highway leading to Jordan.
A car bombing Tuesday night near a police station in Rutba, some 370 km west of the national capital, killed six cops and left 14 people injured.
Four other police died in an attack by gunmen just minutes after the blast, while two soldiers were killed by a car bomb in the centre of Rutba.
Armed militants killed two members of the security forces and wounded three others in a strike on a checkpoint in Huseiba al-Garbiya.
Two cops died when a bomb was detonated as a police convoy passed through the town of Raua, west of Ramadi.
Nearly 1,000 people died last month in Iraq as a result of political or sectarian violence, bringing the civilian death toll for the year so far to almost 6,000, according to figures from the UN mission in Baghdad.