OAK PARK, Ill. — Students and staff returned to Fenwick High School in Oak Park Monday afternoon after a bomb threat forced an evacuation earlier in the day.

According to an email alert sent to families, the school was contacted by Oak Park Police about a bomb threat to the school.

All students, faculty and staff were safe and away from the building, according to the alert.

Police told WGN News someone called the department around 10:30 a.m. and police chose to evacuate the school.

Cook County Sheriffs investigated and determined the school was safe.