A coalition of human rights groups have asked the United Nations to investigate the forcible disappearance of a Spanish citizen almost four years ago. Mustafa Setmariam Nasar was last seen in Pakistan in October 2005. According to media reports, the influential Islamic theorist was apprehended by Pakistani officials and handed over to US officials. He has not been heard from since. Media reports indicate that Nasar was held for a time at a US military base on the British-owned island of Diego Garcia in the Indian Ocean.