SPRING, Texas (AP) Children have returned to classes amid tighter security following a knife fight at a Houston-area school that left one student dead and three hurt.

Metal detectors were in place Monday at Spring High School in Spring, about 20 miles north of Houston.

The campus was closed since last Wednesday's attack left 17-year-old Joshua Devon Broussard dead. Harris County sheriff's deputies arrested 17-year-old Luis Alonzo Alfaro, who was being held Monday on a murder charge with bond set at $140,000.

Investigators blame gang rivalry for the fight in a corridor. Principal Donna Ullrich has announced six meetings are planned with parents to discuss school safety and security.

A service Sunday night for Broussard was disrupted when shots were fired outside Spring Baptist Church. No injuries were reported and nobody was arrested.