A total of 22 people died of violent activities in Mexico's northern regions on Sunday, according to local authorities, Xinhua reported.
Seventeen of the victims were killed in the northern state of Chihuahua. The other five died during an uproar in a concert in the state of Nuevo Leon, also in northern Mexico.
According to Chihuahua's Prosecutor's Office, four men were killed and one woman was injured early Sunday during a shootout in a bar in Chihuahua's Ciudad Juarez, a city bordering the U.S. state of Texas.
Ciudad Juarez is considered the most violent city in the country, constantly plagued by organized crime and drug trafficking.
In a separate incident in Ciudad Juarez, gunmen killed three youngsters who were watching a soccer game inside their car.
Meanwhile, the authorities found corpses of five men with shooting injuries on the highway between Chihuahua city and Cuauhtemoc municipality.
The five men were kidnapped on Saturday by organized crime groups in Chihuahua city, the capital of Chihuahua state.
Another five young men were killed in a bar in Camargo city in southwestern Chihuahua.
Meanwhile, at least five people were killed on Sunday during a concert uproar in Guadalupe municipality, in Nuevo Leon state.
Local police said in a statement that the accident occurred when the music group "Intocable" was performing at the Livestock Expo in Monterrey, Nuevo Leon's capital.
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