Federal police guard a drainage pipe outside of the Altiplano maximum security prison Sunday, July 12, 2015 in Almoloya, west of Mexico City. Mexican authorities are on high alert after Joaquin "El Chapo" Guzman, considered Mexico's most powerful drug lord, escaped from his maximum security prison cell Sunday. Authorities discovered a hole under his shower that led to a 1.5 mile-long tunnel out of the prison. Credit: Marco Ugarte/AP

Photos: ‘El Chapo’ manhunt

The elaborate underground escape route, allegedly built without the detection of authorities, allowed Guzman to escape.