A bomb blast took place in a restaurant in the southern suburb of Baghdad killing 13 people and wounding 17 others, Iraqi police said on Sunday. The police attributed the high human casualties to the crowded restaurant, which carries the name of Safwan.Meanwhile, the Iraqi defense ministry announced the arrest of 15 gunmen in operations throughout Iraq. A ministry's statement mentioned that 12 were arrested in the areas of Badosh and Al-Mousil, southern Iraq and other three were capture in Al-Khaldia, west of Baghdad. Weapons and explosive devices were seized during the operations.