Scenes from the capture of Mexican drug lord El Chapo - in pictures

Marines are shown entering a house during the operation to recapture Joaquin “El Chapo Guzman” Guzman in Los Mochis, Mexico. Manuel Merino. AFP / Marina de Mexico

Screen grab from a handout video taken on January 8, 2016 and released by the Mexican Navy showing marines assaulting a house and capturing a foe during the operation to recapture Mexico’s most wanted drug kingpin, Joaquin “El Chapo Guzman” Guzman in Los Mochis, Mexico. AFP / Marina De Mexico

Clothes of residents are seen at a terrace of a safe house, where five people were shot dead during the operation on January 8, 2016, to recapture the drug lord Joaquin “El Chapo” Guzman, at Jiquilpan Boulevard in Los Mochis, in Sinaloa state, Mexico, January 11, 2016. Edgard Garrido / Reuters

A journalist inspects scattered belongings on January 11, 2016, at a safe house, where five people were shot dead during the hunt for oaquin “El Chapo” Guzman, at Jiquilpan Boulevard in Los Mochis in Sinaloa state, Mexico. Edgard Garrido / Reuters

The kitchen at a safe house in Los Mochis in Sinaloa state, Mexico, where five people were shot dead during the hunt for El Chapo. Edgard Garrido / Reuters

Bullet holes are seen on January 11, 2016, on the wall inside the house where drug trafficker Joaquin “El Chapo” Guzman was hiding before he was recaptured last Friday in Los Mochis, Mexico. Mexico informed Guzman on Sunday that it’s taking steps to extradite him to the US, a move that, while reducing the risk that he escapes for a third time, would also go against their own previous pledges to hold him in Mexico as a matter of national sovereignty. Susana Gonzalez / Bloomberg

A Mexican army vehicle stands guard outside of a motel where Joaquin “El Chapo” Guzman was captured. The world’s most-wanted drug lord was captured for a third time, as Mexican marines staged heavily armed raids that caught Guzman six months after he escaped from a maximum-security prison. Carlos Paulino via AP / El Debate

Members of the press are reflected on a broken mirror on January 11, 2016, while standing next to the door that leads to the tunnel entrance found inside the house where drug trafficker Joaquin “El Chapo” Guzman was hiding out before he was recaptured last Friday in Los Mochis, Mexico. Susana Gonzalez / Bloomberg

Mexico has begun the process of extraditing Joaquin Guzman to the United States, where he faces drug-trafficking charges, but that could take “a year or longer” because of legal challenges, said Manuel Merino, the head of Mexico’s extradition office. He cited one extradition case that took six years.