Five teenage students were injured and two were taken to the hospital after an explosion during an afterschool science activity at a Los Angeles-area middle school.

Glendale police and school district officials say the two hospitalized students had cuts and gashes to their faces from a broken glass beaker or bottle that exploded. The other three had only scratches.

The blast happened at about 4 p.m. Tuesday in a classroom at Eleanor J. Toll Middle School, but the injured students came from neighboring Herbert Hoover High School.

Police spokeswoman Tahnee Lightfoot called the injuries very minor.