Culiacan, Mexico, Mar 4 (EFE).- The bodies of four municipal police officers and three civilians were found in El Rosario, a city in the northwestern Mexican state of Sinaloa, a city official said Monday.
A charred SUV and 70 bullet casings from weapons of different calibers were found at the site where the bodies were discovered, El Rosario Mayor Edgar Gonzalez Satarain said.
El Rosario, a city in the mountains of Sinaloa, had "been spared these acts of violence," the mayor said.
"I hope that the authorities responsible for handling the case will take action and impose order to keep peace in the city," Gonzalez Satarain said.
Police cordoned off the crime scene and launched a search with army troops for the individuals involved in the killings.
Sinaloa is home to the drug cartel led by Joaquin "El Chapo" (Shorty) Guzman.
The Sinaloa cartel, sometimes referred to by officials as the Pacific cartel, is the oldest drug cartel in Mexico and Guzman, considered extremely violent, is one of the most-wanted criminals in Mexico and the United States, where the Drug Enforcement Administration has offered a reward of $5 million for him.
Other gangs, including the Beltran Leyva organization, also operate in the state.
The Beltran Leyva cartel arose as a splinter group of the Sinaloa organization in 2008.
The Beltran Leyva cartel has been weakened by the killings and arrests of several of its leaders, as well as infighting.