ARLINGTON, Wash. — Classes will be back in session today at Arlington High School after students and staff were evacuated yesterday.

The City of Arlington says a 16-year-old student is in custody for allegedly detonating a homemade explosive device in a bathroom at about 8:30 a.m.

Arlington’s police chief is praising teacher Jim Eldridge for quickly extinguishing a fire caused by the device, allowing the building to be safely evacuated.

No one was hurt during the incident.