Suicide bombers hit 3 Saudi cities - An official of the US State De- Navbharat Times Photodhamal

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An official of the US State Department said no American citizens or consulate staff were hurt in the Jeddah blast. He said the United States was aware of reports of explosions in Qatif and Medina and would monitor the situation closely.

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He said the State Department encouraged US citizens in Saudi Arabia "to be aware of their surroundings, and keep security and situational awareness levels high."

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Islamic State has carried out a series of bombing and shooting attacks in Saudi Arabia since mid-2014 that have killed scores of people, mostly members of the Shi'ite Muslim minority and security services.

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Police and groups of local volunteers increased security near mosques in Qatif after suicide bombings hit mosques in Shi'ite areas last year, killing dozens. Another suicide blast at a mosque used by security forces killed 15 a year ago. The top Saudi clerical body condemned the attacks.

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