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Calls for Russia to probe human rights lawyer death

16 September 2011 Last updated at 09:20 BST

Russian authorities are under continuing pressure to investigate the death of a lawyer who died in prison almost two years ago.

Human rights activists believe Sergei Magnitsky was imprisoned after uncovering a massive tax fraud involving among others, the police.

Officials insist the conditions in the jail where he was held have since improved.

The BBC's Oleg Boldyrev was given a rare chance to go inside the prison.