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Authorities say the FBI and the Office of Homeland Security are investigating bomb threats at seven Mississippi school districts.

Mississippi Emergency Management Agency spokesman Greg Flynn told multiple news outlets the federal government is taking the lead in the investigation.

Officials say the Senatobia Municipal School District dismissed students in grades 7-12 Tuesday due to security concerns at the high school.

WREG-TV reports the students were evacuated from the building and relocated to the Northwest Mississippi Community college campus and the Senatobia Police Department.

Other district receiving bomb threats Tuesday included: Hattiesburg Public Schools, Bassfield High School in Jefferson Davis County, Magee High School, Mendenhall High School, Jim Hill High School in Jackson and Tishomingo County Schools.

There have been no reports that any explosive devices were found.