OBLONG, Ill. (WTWO/WAWV) — Update: The Oblong Police Department said several persons have been taken into custody as a result of the investigation into the events that caused Oblong schools to go on lockdown Monday.

In a post to Facebook, Chief Chad Pusey said individuals are located out of state and have been detained and held on charges related to the situation. Police believe the school is safe, and no more threats remain.

Original: Oblong High School and grade school buildings are on lockdown following a threat made through a phone call.

According to the Oblong CUSD #4 Superintendent Michelle Meese, an outside phone call was made to the high school that was threatening, causing the lockdown. Meese reports that both buildings are secure and that students and staff are safe.

The Oblong Police Department, Crawford County Sheriff’s Department, and Illinois State Police are investigating.

As of 3 p.m., the lockdown has been lifted. School officials released the following letter regarding today’s situation.

According to Meese, the investigation is ongoing.