A male student at La Mesa Junior High School in Santa Clarita was detained earlier this week for an alleged verbal threat made against the school, but it was unclear if the boy was the same person who scrawled a threatening message found on the wall of a campus bathroom last week.

The boy allegedly made verbal threats to “shoot up the school,” according to Shirley Miller, public information officer with the Los Angeles County Sheriff’s Department’s Santa Clarita Valley Station.

Because of the written threat, extra deputies began to patrol the campus on Tuesday morning.

The message, which was found on May 16, referenced a shooting and used the number 21, Miller said.

The school will remain open, but out of an abundance of caution and in order to reassure parents and others concerned over the message, patrols will be added at the school, Miller said.

Principal Michele Krantz issued her own message informing parents of the statement and the additional patrols at the school at 26623 May Way.

The author of the threatening message has not been identified, but the matter remains under investigation and whoever is responsible faces possible arrest on suspicion of making criminal threats, Miller said.