Iran - A prominent human rights lawyer in Iran, Nasrin Sotoudeh, has been detained by the authorities.

She is accused of spreading propaganda and conspiring to harm state security, her lawyer has said.

Ms Sotoudeh has represented Iranian opposition activists and politicians, and prisoners sentenced to death for crimes committed when they were under the age of 18.

There has been no comment from the Iranian authorities on the case.

Her lawyer, Mina Jafari, said she had been summoned to Tehran's Evin prison on Saturday and was being held in solitary confinement.

There has been no comment from the Iranian authorities on the case.

Hundreds of opposition activists have been arrested since the disputed presidential election in June 2009. More than 80 have been sentenced to prison terms under security laws.

Iran has come under heavy criticism internationally over the case of Sakineh Mohammadi Ashtiani, an Iranian woman sentenced to death by stoning for adultery. The stoning sentence, reports say, has been halted. She now stands accused of murder and may still be executed.