Alleged social media threats targeting Cabrillo High School prompted Lompoc school and law enforcement officials to announce late Thursday night that both Lompoc and Cabrillo high schools would have additional security on Friday.

The threats, reportedly made on social media platforms, were investigated Thursday by the Santa Barbara County Sheriff’s Office. A sheriff’s spokeswoman said late Thursday that the threats, which raised concerns among students, staff and parents, were found to not be credible.

“The Sheriff’s Office dedicated a large number of deputies and detectives who have worked throughout the day and evening to help investigate these alleged threats,” sheriff’s spokeswoman Kelly Hoover said in a statement sent just before 11 p.m. Thursday. “The Sheriff’s Office has determined there is no credible threat to the school. However in an effort to help alleviate fears and provide additional security, several deputies, including the school resource deputy, will be on campus tomorrow and there will also be increased patrols of the area.”

The threats reportedly involved an Instagram direct message that was sent between two male high school students almost one month ago. The Sheriff’s Office worked with Cabrillo High School administrators Thursday to identify and contact the two involved students, the law enforcement agency reported.

“Deputies contacted the families of the students at their residences and determined the students did not have access to firearms,” the Sheriff’s Office statement said. “The Sheriff’s Office, with the assistance of the Lompoc Unified School District, also investigated rumors of an alleged Snapchat post and alleged hit list, neither of which have been determined to be valid or credible.”

LUSD sent the following message to students and parents on Thursday night:

“A student at Cabrillo High School heard that there was a Snapchat threat to Cabrillo High School and reported it. School district officials and law enforcement officials interviewed ‘nearly 100’ students today. The district has determined this threat was ‘not credible.’ Nevertheless we are taking additional precautions on Friday at both high schools, including additional law enforcement officers, to keep students safe.”

The statement came the same day that a school bus carrying students from Cabrillo High School was allegedly shot with a BB or pellet gun, and a day after sheriff’s deputies were called to another LUSD bus to investigate a “suspicious object” that was determined to not be harmful.

LUSD schools have been hosting emergency lockdown, or active-shooter, drills in recent days.

Hoover said the Sheriff’s Office encourages community members to report any potential threats to law enforcement right away.

Willis Jacobson covers the city of Lompoc for Lee Central Coast Newspapers. Follow him on Twitter @WJacobsonLR.