TERRE HAUTE, Ind. (WTWO/WAWV) — Students and staff at Terre Haute South Vigo High School were placed in a “secure hold” Thursday as police investigated a threat made to the school.

That’s according to a statement from Vigo County School Corporation Interim Director of Communications Katie Shane, who said an anonymous tip involving a potential threat to the school came in Thursday morning.

Terre Haute Police Department reportedly investigated the threat.

While the investigation was ongoing, students and staff were locked down in their classrooms. By 10:45 a.m., the investigation had reached the point where police reportedly felt confident that students could safely return to regularly scheduled classes and continue the school day as normal.

When asked if parents were notified when the “secure hold” began, VCSC Officials said that was not the case as they didn’t have enough information to pass along.

“Families were notified once VCSC administrators and the Terre Haute Police Department had credible information to report. Releasing information any earlier would have been done without confirmed facts,” Shane said.

Shane said VCSC and THPD take situations like this very seriously.

“Our priority continues to be student safety,” Shane’s statement said.