Police said all the dead were from the Arellano Felix cartel, which has come under pressure from a rival gang. Two were wearing police uniforms or equipment, but are thought to have been gang members, police say.
Drug-related violence is a serious issue across Mexico. Nearly 200 people have been killed in Tijuana this year. Investigators believe two of the dead were senior hit men for the Arellano Felix cartel and were identified by large gold rings on their fingers.
It becomes urgency for the mecxican government to do something and control all this drug trafficking and killing.