Mexico has arrested 13 more people in connection with the escape of drug lord Joaquin "El Chapo" Guzman, including the former director of the high-security prison he escaped from and a government official who oversaw Mexico's prisons. A total of 20 officials have now been arrested in connection with Guzman's escape from a maximum-security prison in central Mexico in July. Valentin Cardenas, the former director of the Altiplano prison in central Mexico, and Celina Oseguera, former director of Mexico's federal prisons, were arrested along with 11 prison guards.Guzman escaped through a tunnel built into his cell. Guzman had previously escaped from prison in 2001 and was only recaptured last year.