The BBC has obtained images of alleged police brutality against peaceful protesters in the Bahraini capital Manama, where fears of a systematic crackdown on pro-democracy activists are growing.
Pictures sent by a human rights activist show police from Bahrain's Interior Ministry, and others in plainclothes, their faces hidden by balaclavas.
The police are seen beating and kicking men who are handcuffed and hooded.
The attack occurred on the outskirts of the capital Manama last Wednesday, 30 March, on a busy stretch of road opposite a popular shopping mall.
Eyewitnesses, some of them crying, described a scene that one said "was like watching a horror film."
But the attack is not isolated.
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