Bahrain protests

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Hassan Ammar/AP

Demonstrators shout antigovernment slogans after riot police attacked protesters in Manama, Bahrain, on Feb. 17. Medical officials said four people were killed.

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Tony Mitchell/AP

In this image from video, riot police fire tear gas and wield clubs while storming Pearl Square, occupied by antigovernment protesters, before dawn in Manama, Bahrain, on Feb. 17.

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Hassan Ammar/AP

An antigovernment demonstrator stomps on a picture of Bahraini King Hamad bin Issa al-Khalifa outside Salmaniya hospital in Manama, Bahrain, on Feb. 17.

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Hasan Jamali/AP

Women wait outside a hospital where victims of the confrontation between antigovernment protesters and riot police were being treated in Manama, Bahrain, on Feb. 17.

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Hamad I Mohammed/Reuters

Tanks proceed down the road to the Pearl Roundabout in Manama, Bahrain, on Feb. 17.

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Hamad I Mohammed/Reuters

Protesters gather at Pearl Roundabout in the heart of the Bahraini capital, Manama, on Feb. 15. Thousands of Shiite protesters marched into Manama after a man was killed by police at an earlier antigovernment rally.

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Hamad I Mohammed/Reuters

Protesters gather on the main street in the Shiite village of Sanabis on Feb. 14. Demonstrations broke out nationwide in response to calls on social media sites for major antigovernment protests and were dispersed by riot police firing tear gas and chasing demonstrators.

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Hamad I Mohammed/Reuters

A Bahraini woman shows empty packages of tear gas used by riot police in Manama on Feb. 14. Small-scale clashes erupted as security forces tightened their grip on Shiite communities for 'Day of Rage' protests inspired by upheaval in Egypt and Tunisia.