At least 13 people, including a child and a woman, have been killed in the ongoing drug-related violence in the restless northern territories of Mexico.

Mexico's justice department officials in the northern state of Chihuahua say that an eight-year-old boy and a woman are among victims of criminal gang violence on Friday.

Bodies from separate shootings have also been recovered from the world's 'deadliest' city of Ciudad Juarez, where drug cartel gunmen are alleged to go on daily killing sprees.

"Gunmen aboard two vehicles killed five people, including a woman, who were inside a car in a carwash parking lot in Chihuahua," the state justice department announced.

There have also been reports of killings elsewhere in the southern Chihuahua town of Creel where the bodies of two brothers were found.

Around 2000 people have so far lost their lives in Ciudad Juarez where the victims are usually sprayed with bullets at close range.

Mexico's notorious drug cartels have stepped up their violence despite the federal government's deployment of 8,500 soldiers in the region to help quell outlaw gangs that run a gamut of criminal activities in the country's border areas across from Texas, US.

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