The US State Department has urged Bahrain to immediately release the prominent human rights activist Nabeel Rajab. A spokesman said the US was "very concerned" about Mr Rajab's detention and charges filed against him. Mr Rajab is reported to be facing fresh charges for writing a letter to the New York Times. He has served several prison sentences since setting up the Bahrain Centre for Human Rights in 2002. In his letter publishes in The New York Times on Sunday, Mr Rajab said he had been detained, mostly in isolation, in Bahrain since the beginning of the summer.

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