ROCHESTER (AP) — Authorities are investigating bomb threats phoned in to schools in Minnesota on the same that schools across the country reported evacuations due to threats.

A bomb threat at Ben Franklin Elementary School in Rochester results in students being sent to nearby Mayo High School on Monday until police said it was safe to return. Assistant Superintendent Brenda Lewis said the threat came in just before noon as an automated recording, received on the main office phone.

Forest Lake Elementary school in the city of Forest Lake was also evacuated after a bomb threat call around 12:15 p.m. School district spokeswoman Renee Reedy says police and firefighters searched the school but found nothing. Students were taken to another nearby elementary school and bused home from there.