Duluth, MN (KDAL) - A bomb threat has forced the evacuation of Esko Public Schools. According to the Carlton County Sheriff's Office, all of the students kindergarten through 12th grade were taken to Saint Matthew’s Church in Esko. They were then bussed home or released to parents at 3:15 p-m. The Esko school buildings are closed until further notice as the safety of staff and students are the highest priority. Local law enforcement and the FBI are investigating the threat. Anyone with information regarding the person or persons responsible for the threat should call 911.