El Manzano is a prison

Prison

A prison is a place in which people are physically confined and, usually, deprived of a range of personal freedoms. Imprisonment or incarceration is a legal penalty that may be imposed by the state for the commission of a crime...

 in the city of Concepción

Concepción, Chile

Concepción is a city in Chile, capital of Concepción Province and of the Biobío Region or Region VIII. Greater Concepción is the second-largest conurbation in the country, with 889,725 inhabitants...

, Chile

Chile

Chile ,officially the Republic of Chile , is a country in South America occupying a long, narrow coastal strip between the Andes mountains to the east and the Pacific Ocean to the west. It borders Peru to the north, Bolivia to the northeast, Argentina to the east, and the Drake Passage in the far...

. After the 2010 Chile earthquake

2010 Chile earthquake

The 2010 Chile earthquake occurred off the coast of central Chile on Saturday, 27 February 2010, at 03:34 local time , having a magnitude of 8.8 on the moment magnitude scale, with intense shaking lasting for about three minutes. It ranks as the sixth largest earthquake ever to be recorded by a...

 a prison riot

Prison riot

A prison riot is an act of concerted defiance or disorder by a group of prisoners against the prison administrators, prison officers, or other groups of prisoners in attempt to force change or express a grievance....

began following a failed escape attempt by the inmates. Different parts of the prison were set on fire and the riot was only controlled after the guards shot into the air and received help from military units.

On March 3 of 2005 it was reported that guards had found a 7 meter long tunnel made by inmates.