The schools were closed soon after classes began and approximately 2,500 students were sent home for the rest of the day. The search continued throughout the day, but no explosive devices had been detected by late afternoon, school officials said.
School officials confirmed they had found a note early Tuesday at Kent County Middle School in Chestertown. The note contained threats to every school building in the district, officials said. Officials have not disclosed what time and where the note was found at the middle school or its exact contents. The threat was credible enough to order an evacuation, which began shortly before 9 a.m., officials said.
Once police have cleared the buildings, staff would be permitted to return to offices and classrooms, officials said.
Classes were expected to resume on time Wednesday, officials said.