document: 4 shot dead near school CIUDAD JUÁREZ , Mexico -- Authorities said gunmen opened fire on a burrito stand in the border city of Ciudad Juárez , killing the stand 's owner , his 10-year-old son and two other people . The shooting occurred Friday in front of an elementary school . The motive of the shooting is unclear . Denver Post wire services
extractive_keyphrases: authorities shot dead near school border motive the shooting ciudad mexico gunmen his 10yearold friday front fire stand elementary
abstractive_keyphrases: ciudad jurez killing stand's unclear denver shooting