MEXICO CITY — The federal and state police, backed by the Mexican Army, took over security in the Pacific Coast city of Acapulco on Tuesday, responding to suspicions that the city police force had been infiltrated by organized crime, the authorities said.



Two police commanders were arrested on homicide charges and the rest of the force will face investigation, according to the Guerrero Coordination Group, a combined military and police task force for the embattled state of Guerrero.

The decision to disarm the local police was prompted by rising crime in the resort city and the “nonexistent response of the municipal police to the phenomenon,” a statement from the group said.

The director of the city transit police was also detained after he was found to be carrying unauthorized weapons. The Guerrero state police, backed by soldiers, marines and federal police officers, will replace the local police force, the statement said.