Eugene fire and police departments are investigating after a mysterious fire started at Sheldon High School last night.
Lance Lighty with the Eugene-Springfield Fire Department said the fire caused severe damage to one modular classroom.
“There's two modular buildings connected by a wood deck, about 20 feet apart from each other," said Lighty. "Then they sat behind the gym, about 10 feet off the gym. And again there was no damage to the other modular or the main part of the school.”