Officials at West Valley College in Saratoga said Tuesday the school received a "credible" bomb threat and the campus was evacuated.
Classes were canceled for the day but will resume Wednesday, a school official confirmed to NBC Bay Area.
The school sent out a tweet shortly after 10 a.m., an hour after a student found a letter somewhere on campus that mentioned a bomb planted at the school, college spokesman Scott Ludwig said. After looking at the letter, campus police determined the threat was credible.
By 11 a.m., the campus was empty, except for some patrol cars stationed outside. Some students joked on Twitter the threat had saved them from a biology exam.
The campus is located at 1400 Fruitvale Avenue in Saratoga and is part of the 112-campus California community college system. The school was updating its community on the university website.
Bay City News contributed to this report.