The death toll from a suicide bombing in Iraq's Shiite holy city of Karbala on Monday rose to 43, with 55 others wounded, an interior ministry source said.(Xinhua/Reuters Photo)

A female suicide bomber struck Shiite worshippers in the holy city of Karbala on Monday, an official and a witness said, killing at least 43 people and leaving pools of blood on the street leading to one of Iraq's most revered mosques. 

The blast was the deadliest in a series of attacks that left at least 72 Iraqis dead, including six youths killed when mortar rounds slammed into a soccer field in eastern Baghdad.