BBC – Mexican drug lord Joaquin Guzman, known as El Chapo or “Shorty”, used an elaborate tunnel to break out of a maximum security prison, officials say.
His escape route from Altiplano jail was more than 1.5km (1 mile) long and had ventilation and stairs, the national security commissioner said.
Eighteen guards are being questioned.
Guzman was last seen in the showers of the jail on Saturday. It was the second time he had escaped from a top security prison.
In 2001 he broke out by hiding in a laundry basket after bribing prison officials.
He had been serving a sentence of more than 20 years after being arrested in Guatemala in 1993.
His recapture in 2014 was hailed as a victory for Mexico’s government.
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