BUENOS AIRES, Argentina—An alleged Colombian drug lord captured in Argentina is asking a local judge to reject his extradition to the United States.

Henry de Jesus Lopez Londono says he faces political percussion and his life is in danger.

Lopez Londono is 41-years-old and is known as "Mi Sangre," or My Blood. He was caught as he arrived at a restaurant on the outskirts of Buenos Aires on Oct. 30.

Authorities say he's the leader of the "Urabenos" gang and is wanted on drug trafficking charges in Colombia and the U.S.

Lopez Londono's lawyer denies his client is a drug trafficker and says he gathered evidence while part of a right-wing paramilitary group. Lawyer Carlos Olita says police officers and officials in former President Alvaro Uribe's government are trying to stop him from testifying.