Charles Sobhraj, the notorious French serial killer of Indian and Vietnamese parentage who committed a string of murders across Asia in the 1970s and was sentenced to life, was on Friday taken to the airport for his deportation to France, hours after he was released from a Nepalese prison.Sobhraj, 78, was released from the Central Prison here and handed over to the immigration authorities to process his travel documents, officials said, two days after the Supreme Court ordered that he be released and deported to his home country.