The entire police force of the northern Mexico city of Linares is being held for investigation of possible corruption and ties to organized crime. Mexican soldiers and Nuevo Leon state police are patrolling instead.
The detention of more than 100 officers comes after a rise in kidnapping and extortion in the area. A series of investigations in other towns already has put hundreds of officers in custody.
Linares Mayor Francisco Medina Quintanilla told Milenio Television on Sunday that his city's police officers were put on buses and driven to another town. They will held there by state investigators while they are investigated.
Linares is about 75 miles (120 kilometers) southeast of the northern industrial city of Monterrey.