"At least 38 people were killed and 74 others wounded Saturday when a suicide bomber stepped onto a bus carrying Shiite pilgrims in Iraq and detonated himself, police officials said.
The attack -- which occurred between Baghdad and Samarra -- was the second targeting pilgrims in the last three days.
The suicide bomber detonated at least 10 kilograms of explosives concealed in his vest, Samarra police officials said.
Most of the casualties were Shiite pilgrims heading back south to Nasiriya from Samarra in the north. Some of the wounded were on other buses waiting at the security checkpoint where the attack occurred."
Update: "The toll from a suicide bombing that targeted Shi'ite pilgrims near the city of Samarra, one of Iraq's worst in recent weeks, rose to 48 dead and 80 wounded, police and officials said on Sunday."