By Kasra Naji, BBC Persian
The BBC is making an unprecedented appeal to the UN to stop Iran from harassing its Persian service staff in London and their families in Iran.
It says Iran has stepped up a campaign of intimidation, including threats, arrests of relatives and travel bans.
Iran began targeting the BBC's Persian service after the disputed 2009 presidential election, when Tehran accused foreign powers of interference.
The appeal will be made at a meeting of the UN Human Rights Council in Geneva.