MEXICO CITY — A judge in Mexico has ordered the detention of 16 guards and officials at a prison near the U.S. border where the brutal Zetas drug cartel orchestrated a mass tunnel escape of more than 130 inmates.

The judge ruled Wednesday that the prison director, two top aides and 13 other prison employees be held for 40 days under a form of house arrest, pending possible charges.

The judge said there was credible evidence that prison employees aided the escape.

On Tuesday, authorities detained two of the escapees following a shootout with police.