Police in Decorah have arrested a man after a threat led the district to increase security at its schools on Monday. Officials say Bruce Divers Jr. sent an email to the school district claiming he wasn't notified about a sex education video and other materials made available to fourth graders. Police say he then threatened two teachers via Facebook.

Divers was arrested on charges of harassment. The extra security at schools led many parents to keep their kids home from school. The district said that 26% of students were reported absent on Monday.

[via KCRG]