Baquba: A car bomb killed 30 people and wounded 46 near a mosque in a predominantly Shiite area of the mixed city of Baquba, north of the Iraqi capital Baghdad, on Wednesday, security officials said.
The bomb in a car parked near a Shiite mosque in the Abu Sayeeda neighbourhood of the city exploded at around 6:00 pm (1500 GMT), an official from Baquba Operations Command said.
Police imposed a curfew in the area as they suspect there may be more bombs, the official said.
Diyala province, of which Baquba is the capital, is confessionally and ethnically mixed and has been a persistent target for attack by Al-Qaeda militants seeking to exploit its communal tensions.
On Monday, a bomb in a car parked in front of a coffee shop killed seven people and wounded 21 in the city, police said.
And on Tuesday, six Iranians and two Iraqis were wounded by a car bomb targeting a bus in Jadidat al-Shat to the west of the city.
US and Iraqi officials have warned of the dangers of an upsurge in violence as negotiations on forming a new governing coalition have dragged on, giving insurgent groups an opportunity to further destabilise the country.
More than four months after a March 7 general election which gave no single bloc an overall parliamentary majority, the two lists which won most seats are still bickering over who should be the next Prime Minister.
On July 12, Iraqi politicians extended an inaugural parliamentary session by two weeks to give rival blocs more time to form a government.
But on Wednesday, the top US commander in Iraq, General Ray Odierno, said that recent attacks, including a suicide bombing on Sunday that killed at least 45 people -- Iraq`s deadliest single attack in more than two months -- would not affect the withdrawal timetable for US troops.
"I believe it is in the best interest of our mission" to keep the timetable. "It`s important that we live up to our commitment."
US President Barack Obama has promised to scale back the US military presence to 50,000 troops by August 31 ahead of a full withdrawal in 2011.