A 4-year-old boy was killed by gunmen while he was playing outside a neighbor’s house in Ciudad Juarez, considered Mexico’s murder capital and the most dangerous city in the world, police said.

Alan David Carrillo was playing with a friend when a group of gunmen opened fire on the house, the Ciudad Juarez municipal police department said in a statement.

The boy’s relatives rushed him to a clinic, but he died a few minutes after arrival at the medical facility.

Ciudad Juarez, located across the Rio Grande from El Paso, Texas, has been plagued by drug-related violence for years.