NEW : Mauritania Rep. Nancy Pelosi is in Libya to lead a congressional delegation . Al-Senussi was arrested at an airport in U.S. on 1988 , Libyan authorities said . Mauritanian security authorities arrested Abdullah al-Senussi , Libya 's former chief of intelligence and one of the Gadhafi regime 's most wanted men . He was the intelligence chief for Mauritania 's Jomana Karadsheh . He is wanted by the International Criminal Court .
NEW : Mauritania Rep. Nancy Pelosi is in Libya to lead a congressional delegation . Al-Senussi was arrested at an airport in U.S. on 1988 , Libyan authorities said . He was the intelligence chief for Mauritania 's Jomana Karadsheh . He is wanted by the International Criminal Court .