Redwood High School in Larkspur is being evacuated because of a bomb threat

The K-9 unit was sent in to investigate a bomb threat at Redwood High School in Larkspur. Sept. 18, 2017

Redwood High School in Larkspur was evacuated Tuesday morning because of a bomb threat.

The school tweeted the announcement out at 9:17 a.m.

Marin police and the Marin County Sheriff's office helped to get the 1,900 students outside and sent in K-9 units to sniff out trouble.

Students were told to go home by 1 p.m.

RHS being evacuated due to bomb threat. Updates will be forthcoming. Do not call school or come to school. Thx for your cooperation.

— Redwood High School (@RHSGiants411) September 19, 2017