The United States has called for a fair trial of Libya\'s former intelligence chief Abdullah al-Senoussi, as he was extradited back from abroad over charges of crimes against humanity. \"We understand that al-Senoussi is now in Libyan custody,\" State Department spokesman Patrick Ventrell said at a regular news briefing here on Wednesday , noting \"He has been accused of crimes against humanity. The international community has been very clear that he should be held accountable for his actions.\" Al-Senoussi arrived Wednesday afternoon in the Libyan capital of Tripoli after being extradited from Mauritania where he was arrested in March for illegally entering the country. In 2011, the International Criminal Court issued warrants against al-Senoussi as well as Muammar Gaddafi and his son Saif Islam over charges of crimes against humanity stemming from the crackdown on anti-Gaddafi protesters. Libya\'s deputy prosecutor general was quoted by media as saying that al-Senoussi will receive a medical check and then face interrogation. \"It will be critical that Libya take all necessary steps to ensure that he\'s held securely, treated humanely and tried fairly in full compliance with Libya\'s international obligations,\" Ventrell said. \"A fair administration of justice in accordance with its international obligations, this is where Libya can mark another important milestone in its democratic transition.\"