Mexico City, May 23: At least 43 people including a police official were killed in a shoot out in Mexican state of Michoacan, media reported.
The shoot out took place in connection with drug related case.
The authorities in Mexico have been fighting with the area's most powerful drug cartel, Jalisco New Generation, for years.
"The majority of those killed are believed to have been cartel members,"National Security Commissioner Monte Alejandro Rubido was quoted as saying.
At least 30 rifles and other arms and ammunition have been recovered from the shoot out location.
The circumstances leading to the violence are not yet clear and federal security officials are travelling to the area to investigate.
The Jalisco New Generation cartel has increased its presence in the area, with Michoacan and Jalisco becoming among Mexico's most violent states. Gang members are believed to have killed at least 20 police and soldiers since March.