Eight people were murdered in separate incidents in the northern state of Chihuahua, Mexican authorities said Wednesday.

Five males, one of them a 17-year-old, were found fatally shot Wednesday inside an abandoned car in the town of Guachochi, the state Attorney General's Office said.

The victims are thought to have been killed Monday.

Police received an anonymous telephone call alerting them to the presence of the bodies, AG's office spokesman Carlos Gonzalez told Efe.

Guachochi lies in an area of intensive marijuana cultivation in the Sierra Tarahumara mountains.

Two other men were found shot to death on a road in Ascension, about 180 kilometers (112 miles) southeast of the border metropolis of Ciudad Juarez.

That discovery also followed an anonymous tip, the Chihuahua AG's office said.

The eighth victim, another male, was beaten, shot and then dumped on a road in the southern town of Jimenez.

Chihuahua, which borders Texas, has accounted for nearly 30 percent of the more than 70,000 gangland murders committed in Mexico since December 2006.

Most of the Chihuahua killings occurred in Ciudad Juarez, long the scene of a brutal turf battle between drug cartels. EFE