MUAMMAR Gaddafi's fugitive former spy chief, wanted by the International Criminal Court for crimes against humanity, has been extradited to his home country of Libya. Abdullah al-Senoussi's extradition from Mauritania, where he was arrested in March as he tried to enter the country from Morocco using a Malian passport under a different name, was first announced by Mauritanian state television. "Mauritanian authorities hand over ex-Libyan spy chief Abdullah al-Senussi to Libya," read a news flash on the screen. In Tripoli, deputy prosecutor general Taha Baara said: "We confirm that Abdullah al-Senoussi has been returned to Libya. A short time ago he was delivered to the office of the prosecutor general. He will undergo routine medical examination before questioning begins immediately afterwards," he said. "We will decide his fate afterwards. "His extradition took place following the decision of the Mauritanian courts and its ratification by Mauritanian President Mohamed Ould Abdel Aziz." Ex-spy chief Senoussi, a heavy-set man in his early 60s with a thick jaw line and bushy black eyebrows, had been on the run for months when he was caught trying to sneak into Mauritania. Wednesday's move comes after Libya said Gaddafi's son Seif al-Islam will go on trial this month in the town of Zintan, despite an ICC warrant against him also for arrest on charges of crimes against humanity. Activists have raised concerns that Seif, 40, could face the death penalty if tried in Libya. Seif's lawyers said on July 31 he wants to be put on trial in The Hague for justice to be served. The ICC says Senoussi, the former head of military intelligence in Libya, played a "crucial" role in attempting to crush the popular revolt that eventually ousted the Gaddafi regime late last year. In the arrest warrant issued in June 2011, the ICC said Senoussi was an "indirect perpetrator of crimes against humanity, of murder and persecution based on political grounds" in the eastern Libyan city of Benghazi, cradle of the revolt. On Wednesday the ICC told AFP: "We have not received official information on the transfer" of Senoussi. "Libyan authorities have an obligation to surrender Abdullah al-Senoussi to the ICC. Abdullah al-Senoussi is wanted by the ICC on the basis of an arrest warrant issued by ICC Pre-Trial Chamber for alleged crimes against humanity (murder and persecution) on 27 June 2011," the court said. "The judges of ICC Pre-Trial Chamber I now have to make a decision on the admissibility of the case and they will do so in due course." Rights watchdog Amnesty International said Senoussi should have been surrendered to the ICC. "The decision to send him to Libya - with its weak justice system and inadequate fair-trial guarantees - will inevitably delay justice for victims and could lead to violations of Senoussi's rights to a fair trial," Amnesty's Marek Marczynski said in a statement. "The ICC arrest warrant for Senoussi remains in force and Libya has an obligation to surrender him without delay to The Hague." Tripoli had pushed hard for the extradition of Gaddafi's brother-in-law and feared former right-hand man, who is also wanted by France. In 1999, a Paris court sentenced Senoussi in absentia to life in prison for involvement in the bombing of a French UTA airliner over Niger in September 1989. The plane was carrying 170 people from Brazzaville to Paris via N'Djamena. That attack - along with the bombing of a Pan Am jumbo jet over Lockerbie, Scotland in December 1988 in which 270 people were killed - led to a UN-mandated air blockade of Libya in 1992. Interpol had issued a so-called "red notice" for Senoussi on behalf of Libya. It said he was wanted "for fraud offences including embezzling public funds and misuse of power for personal benefit." Senoussi was one of the last members of the late Gaddafi's inner circle to be arrested. Others still at large include the dictator's son Saadi, who has taken refuge in Niger.