At least 10 people were killed and more than 30 wounded in a series of attacks in Baghdad on Wednesday, one of them a twin car bombing in a business district, security sources said.
Eight people were killed and 25 wounded when the two bombs went off minutes apart in the Al-Khark district of west Baghdad, an interior ministry official said.
Earlier, two people were killed and 13 wounded, six of them policeman, when three makeshift mines went off in east Baghdad.
"A bomb which was intended for Al-Jadida district Mayor Essam al-Temimi, went off in the Zatunah neighbourhood killing a civilian and wounding two of his bodyguards," a security source said.
A man was then killed when a mine went off on Palestine Street as a police patrol passed. Five people were wounded, three of them policemen.
And six people were wounded, three of them soldiers, when their convoy hit a makeshift mine.
Outside the capital, three people were killed and one wounded when gunmen opened fire on their vehicle near the northern oil city of Kirkuk, police Lieutenant Abdullah al-Obeidi said.
Nationwide, levels of violence had reached four-year lows but they have picked up again in recent weeks.
On Monday, 34 people were killed and dozens wounded, including 22 when a woman suicide bomber blew herself up in a crowd of people who had gathered for a feast in the province of Diyala.
On Friday, a suicide bomber blew up a lorry near a police station in Dujail, north of Baghdad, killing 31 people in the deadliest attack in nearly three months.
The new commander of US forces in Iraq, General Raymond Odierno, warned when took up his new post on Tuesday that recent security gains remained "fragile and reversible."