Classes resumed this morning at Amador Valley High School after a bomb scare caused the campus to be evacuated Friday morning by a reported email bomb threat.
The threat was sent just after the start of the school's early "A period."
No evidence of explosives was found during a search by Alameda County Sheriff's Office bomb-sniffing dogs, according to Pleasanton police Lt. Jeff Bretzing.
Amador Valley principal Tom Drescher received the bomb threat via email just before 7 a.m., according to Bretzing. Students were evacuated off the campus and sent home, and teachers and staff waited nearby until the high school was cleared.
Police and school officials reopened the campus around 11 a.m., but no classes were held Friday.
Investigators are working on finding who sent the threatening email, but the culprit hasn't been located yet.