Explosives specialist police conduct their investigation after a bomb blast in the village of Sitra,

Explosives specialist police conduct their investigation after a bomb blast in the village of Sitra, south of Manama, Bahrain, July 28, 2015. The bomb attack killed two Bahraini policemen on duty in the mainly Shi'ite village of Sitra, south of the capital Manama, the Interior Ministry said on Tuesday, days after the government said it had disrupted an arms smuggling plot linked to Iran. (REUTERS/Hamad I Mohammed)