Hammering heard in new video of the minutes before Mexican drug lord escapes into tunnel

FILE - In this file screen grab of video from a security camera, dated July 11, 2015 and released by Mexico's National Security Commission, shows the man Mexican authorities say is Joaquin "El Chapo" Guzman, pacing inside his cell at the Altiplano maximum security prison, shortly before escaping through a tunnel below the shower area, top right, in Almoloya, Mexico. A new closed circuit prison video broadcast Wednesday, Oct. 14, 2015, by the Mexican television chain Televisa, reveals hammering sounds several minutes before the country's most notorious drug lord escaped from his cell through a tunnel. (Mexico's National Security Commission via AP, File) (The Associated Press)

New video in Mexico reveals hammering sounds several minutes before the country's most notorious drug lord escaped from his cell through a tunnel.

The closed circuit prison video broadcast Wednesday by Televisa shows a longer segment of surveillance on Joaquin "El Chapo" Guzman on July 11 than what the government released. It also includes sound.

Guzman can be seen lying on his bed under a blanket watching television when the hammering begins. A split screen with the prison control room shows no one reacting.

Even when Guzman disappears into the tunnel in the floor of his cell's shower, there is no visible reaction in the control room. Twenty-five minutes pass before two officers gather in front of screens and talk.

Almost 30 minutes pass before guards appear outside the cell.