Protesters stand in front of massed ranks of police in Sitra in Bahrain today (Photo: Mazen Mahdi)
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2115 GMT: The Arabic Network for Human Rights Information updates on four activists of the 6 April Movement who were detained on Monday for sticking up posters critical of the ruling Supreme Council of the Armed Forces. One was released today, but three remain in detention and will appear before judge on Thursday morning.
2035 GMT: More photographs from Mazen Mahdi of protest and police in Sitra today: