Baghdad, Iraq ? Sunnis and Shiites traded bombings and mortar fire against mainly religious targets in Baghdad well into the night Tuesday, killing at least 68 people a day after authorities lifted a curfew that had briefly calmed a series of sectarian reprisal attacks.

At least six of Tuesday’s attacks hit clearly religious targets, concluding with a car bombing after sundown at the Shiite Abdel Hadi Chalabi mosque in the Hurriyah neighborhood that killed 23 and wounded 55. A separate suicide bombing killed 23 people at an east Baghdad gas station, where people had lined up to buy kerosene.

The surge of violence deepened the trauma of residents already shaken by fears the country was teetering on the brink of sectarian civil war, threatened talks among Iraqi politicians struggling to form a government and raised questions about U.S. plans to begin drawing down troop strength this summer.

Iraq began to tilt seriously toward outright civil war after the Feb. 22 bombing of the important Shiite Askariya shrine in the mainly Sunni city of Samarra, 60 miles north of Baghdad.

President Bush decried the latest surge in sectarian violence Tuesday and said that for Iraqis “the choice is chaos or unity.”

An Iraqi army soldier passes the wreckage of the car used for a bombing Tuesday in Baghdad, Iraq.

The sectarian violence has hit Baghdad hardest because the population in the capital is about evenly divided between Shiites and Sunnis, more so than in any other region of the country.

In an unusual move, the government issued a statement declaring that 379 people had been killed and 458 wounded as of 4 p.m. Tuesday in the sectarian violence tied to the Askariya bombing.