Bombs targeting mourners in Baghdad killed at least 57 people on Saturday, as another 12 people, among them 10 security forces members, died elsewhere in Iraq, officials said.

Bombs targeting mourners in Baghdad killed at least 57 people on Saturday, as another 12 people, among them 10 security forces m

embers, died elsewhere in Iraq, officials said.

In the deadliest incident, two bombings struck near a funeral tent in Sadr City, north Baghdad, at about 5:30 pm (1430 GMT), killing at least 57 people and wounding more than 120.

Sources said one of the blasts came when a suicide bomber detonated an explosives-rigged vehicle, while the other was either a bomb left under a car or a car bomb.

The Sadr City blasts came a day after two bombs exploded in a mosque north of Baghdad, killing 18 people.

Ten Iraqi security forces members -- another frequent target of militants who oppose the government -- also died in attacks on Saturday.

Five suicide bombers wearing SWAT uniforms attacked a police base in Baiji in the morning, while most of its forces were out on a mission, killing four police.

Police killed one of the bombers, who were on foot, but the others managed to detonate their explosives inside the base.

In the northern province of Nineveh, gunmen killed two prison guards, a soldier and one of the governor's guards, while a roadside bomb killed two more soldiers.

And in Kirkuk province, also in north Iraq, gunmen kidnapped a local official, who was found after being shot dead. A soldier was kidnapped and killed in Kirkuk the day before.

Saturday was the deadliest day for Iraq since August 28, when attacks killed 75 people.

More than 540 people have now been killed so far this month and over 4,300 since the beginning of the year.