At least four worshippers were killed and eight wounded on Friday when two bombs exploded at two Sunni mosques in the Iraqi city of Baquba, police said. The blasts happened just after midday prayers in the city, 65 km (40 miles) north of Baghdad. No further details were available.
Mosques and shrines are major targets in the sectarian bloodshed between Shias and minority Sunni Arabs wracking Iraq and threatening to drag it into civil war.
Iraqi and US officials say the Shia-Sunni strife is now killing more civilians than the insurgency against US-led and government forces.
More than 60,000 Iraqis have fled their homes since the February 22 bombing of an important Shia shrine.
The official said they were kidnapped on Thursday and then killed. Gunmen abducted them in groups during the morning and evening as they left the company and then shot them. Gunmen have recently mounted a spate of raids on businesses in Iraq, kidnapping, killing, and stealing money.