An anonymous online threat prompted a lockdown and cancellation of classes at Carlsbad High School Monday and Tuesday.
Teachers were directed to secure all students in their classrooms at the Monroe Street campus about 10 a.m., according to school district officials. Authorities did not disclose the nature of the threat, which had been posted on the social-networking service Instagram.
Students were kept locked inside for a little over an hour as officers performed a sweep of the grounds and buildings, finding nothing hazardous. At 11:15 a.m., campus administrators released all students for the day as police continued to investigate.
Early Monday evening, Carlsbad Unified School District Superintendent Suzette Lovely announced that Carlsbad High and Carlsbad Village Academy would be closed Tuesday as an "added safety measure" and "in an abundance of caution."
It was unclear why the second school was included in the precautionary action.
All other CUSD schools were to be open and operating as usual, Lovely stated in a message on the high school's website.
