By CBS13 Staff

SAN ANDREAS (CBS13) – A possible threat posted on social media prompted a lockdown at Calaveras High School.

The Calaveras County Sheriff’s Office says school officials learned about posting late Monday morning.

Exactly what was stated in the post is unclear, but the school went on lockdown out of an abundance of caution while deputies searched the campus.

All students and staff are safe, the sheriff’s office says.