Eleven Iraqis were killed and a dozen more wounded in a blast in a volatile area north of Baghdad on Monday.
The bomb was apparently planted in a bus, 20 km outside the town of Baquba.
Police says the Iraqis were traveling to work in the camp of Ashraf, which is currently guarded by a 120-strong Bulgarian contingent.
Baquba is 65 km north of Baghdad, in a religiously mixed region.
Sofia news agency 29 May, 2006