A Howard County student faces a felony charge, and another likely will be charged after an explosive device was detonated at Mount Hebron High School in Ellicott City, police said yesterday. No one was injured in the incident Tuesday. On Thursday morning, one boy was charged as a juvenile with making and using a destructive device, a felony, and reckless endangerment, police said. Police identified a second student Thursday night, and they plan to charge him with the same counts. Both are 15.
About 7:15 a.m. Tuesday, students reported that they heard an explosion in the lobby, police said. Administrators told police that a device had gone off in a trash can and was accompanied by an unusual odor. The homemade explosive was made with household cleaning chemicals, police said. A surveillance video helped identify two students near the site of the incident. The school has taken disciplinary action against the boys, a spokeswoman said.