The bodies of seven supposed cartel hitmen have been discovered dumped on a dirt road next to a bullet-riddled pickup truck.
The grisly killings happened in the violence-plagued western Mexican state of Sinaloa, home of notorious drug lord Joaquin “El Chapo” Guzman.
It is believed the deaths are as a result of a running gun battle between rival drug gangs.
Public security minister Cristobal Castaneda said: “There are seven bodies, most of whom were wearing tactical clothing and vests, apparently only one firearm was found.
“Clearly this is a fight between gangs or organised criminal groups.”
He added that the rival groups had clashed on eight separate occasions in the area since May 29.
The bodies of nine others were also discovered following a separate attack.
Seven of the victims are believed to be local residents while the other two bodies have not been identified.
One of the unidentified bodies had an AK-47, Castaneda said.
Police also confiscated 40 high caliber weapons, 10 grenades, 36,000 rounds of ammunition and 24 vehicles, an official said.
Local media reports that the victims were all men aged between 20 to 50.
Mexican President Andres Manuel Lopez Obrador assumed the presidency in December 2018 pledging to pacify the country with a less confrontational approach to security.
However, violence has continued rising and murders hit an all-time high last year.