Sky News OnlineThe lawyer representing an Iranian woman sentenced to death by stoning for adultery has gone missing.Mohammed Mostafaei has not been seen or heard from since last Saturday when he spent four hours being questioned at the notorious Evin prison.

The Iranian government's actions have caused concern among human rights groups in the West.It's deeply worrying that the Iranian authorities now appear to be targeting Sakineh's lawyer," Tim Hancock, the UK campaigns director of Amnesty International told The Times."Mohammed Mostafaei is a lawyer doing his job, trying to defend his client. He should be left alone to practise the law, not subjected to harassment and intimidation."It's shocking that the authorities have detained his wife and her brother in an apparent effort to put pressure on Mostafaei."The Foreign and Commonwealth Office says it is disturbed by the arrests and said of Mr Mostafaei: "He's been bravely defending the legitimate rights of Iranian citizens under Iranian and international law."Mr Mostafaei, who is in his late thirties and has a seven-year-old daughter, is known for his brave choices as a human rights lawyer, successfully representing a number of death-row inmates, particularly juveniles.He also writes a blog that highlights human rights abuses in Iran.