At least 36 people have been killed and 40 injured in a suicide attack on a Shi'ite funeral in Miqdadiya, 100km north of Baghdad.
The bomber, wired with explosives, walked up to a group of about 100 mourners burying the victim of a drive-by shooting before detonating his bomb at the graveside.
The attack happened during the funeral of a member of one of Iraq's main Shi'ite political parties.
A young girl was also killed in yesterday's shooting although the
target of the attack, an official of the Dawa party, survived.
Several attacks in Baghdad
At least 13 people died in the capital on a day of increased violence.
A car bomb blew up outside a police precinct issuing identity cards in a Shi'ite neighbourhood of north Baghdad. Five people were killed and 15 injured.
Another car bomb exploded in south Baghdad as police commandos drove by. Two commandos and a civilian were killed and 11 people were injured, though some reports put the toll higher. The car was parked close to a busy commercial market in the Doura district.
A police commando was killed and 18 others injured in clashes in the west of the capital. Many suffered shrapnel wounds.
Earlier in the day, a senior oil ministry official and his son were shot dead in their car in the same area of the capital. Their driver was wounded.
In central Baghdad, at least two people were wounded in a roadside bombing.
In Baquba further north, one woman was killed and several people injured in two bomb attacks.
Attacks on oil supplies
Separately, gunmen are reported to have ambushed a convoy of oil tankers on their way to Baghdad from Baiji, and some reports say 20 tankers were destroyed.
In a separate attack in the afternoon, rebels torched three tanker trucks just north of Baghdad.
Deliveries of petrol and other refined products from Baiji had only resumed earlier this week after truck drivers walked off the job for nearly a fortnight to protest against death threats.
They only agreed to return to work after the authorities agreed to provide military escorts for tanker convoys.