HOUSTON (AP) — Houston police say an 11-year-old boy was fatally stabbed while walking home from school and that officers are searching for the suspect.

Investigators say Josue Flores was walking on a sidewalk Tuesday when a man walked toward him and stabbed him several times in an "unprovoked" attack. A murder warrant has been issued for the suspect, 31-year-old Che Lajuan Calhoun.

Police provided no information Wednesday on a possible motive or relationship between Josue and Calhoun.

Witnesses reported seeing the man and the boy struggle before the child collapsed onto some grass, then the suspect ran. A bystander flagged down police.

Josue was pronounced dead at a Houston hospital.