ALTOONA, Iowa (Via KCCI) — Authorities in central Iowa are investigating a phone-in threat against the Southeast Polk School Board. The incident happened during Thursday night’s Board meeting in Altoon. Altoona police evacuated and searched the district office after the threat was called in. Specifics regarding the nature of the threat were not revealed.

School board member Whitney Smith-McIntosh posted on Facebook that the board members were escorted out of the meeting about an hour into it. Authorities report nothing was found, and that they believe they have identified the caller.