Mexican judicial authorities say the number of public officials ordered held for trial in connection with the escape of drug lord Joaquin "El Chapo" Guzman has risen to 13.

In a statement late Thursday, court officials say that among those being held for trial are the former coordinator general of federal prisons, the former director general, nine monitors from the Altiplano prison's control room and the prison's commander.

The men are being held at the same maximum security prison where Guzman escaped July 11 through a long tunnel that led to his cell. The two women among the detainees are being held at a prison in the Pacific state of Nayarit.

A judge ordered the former director of the Altiplano prison held for trial earlier this week.