Tehran - Iranian authorities have arrested a niece of supreme leader Ayatollah Ali Khamenei after she recorded a video describing the authorities led by her uncle as a “murderous and child-killing regime”, it emerged on Sunday. Farideh Moradkhani comes from a branch of the family that has a record of opposition to Iran’s clerical leadership and has herself been jailed previously in the country. Her brother Mahmoud Moradkhani wrote on Twitter that she was arrested on Wednesday after going to the office of the prosecutor following a summons. Then on Saturday, her brother posted a video on YouTube, with the link shared on Twitter, where she condemned the “clear and obvious oppression” Iranians have been subjected to and criticised the international community’s inaction. “Free people, be with us! Tell your governments to stop supporting this murderous and child-killing regime,” she said. “This regime is not loyal to any of its religious principles and does not know any law or rule except force and maintaining its power in any way possible.”