(CNN) -- Eight suspected drug traffickers were killed in a confrontation with the Mexican army Thursday in northern Mexico, a federal police official said.
"A group of about 100 soldiers were on patrol in the mountainous area near Madera, northwest of Chihuahua when they were fired upon by a group of armed gunmen. Eight of the bad guys were killed in the shootout. The Mexican military did not suffer any casualties," federal police spokesman Ramon Salinas said.
The area where the conflict happened is a major drug-trafficking cooridor, Salinas said.
"This is an important trafficking route for them," he said.
CNN's Nick Valencia contributed to this report.