Some of the incidents that have taken place in the week since the Sandy Hook Elementary School shooting:
• At Council Rock High School South in Holland, Pa., student reports of a fellow student’s threatening statements led police to arrest a ninth-grader Thursday. Two 9-mm handguns were in plain sight in the boy’s bedroom, and he was taken into custody, police say. The school canceled classes Friday so police could search the building. The Council Rock district is headquartered in Newtown, Pa., though police say there’s no indication the student mentioned the Newtown, Conn., shootings.
• On Monday, police say they found a high-caliber rifle and notes about a possible attack when they arrested an 18-year-old suspected of a plot against fellow students at Bartlesville High School in Oklahoma. In addition, the whole district closed Wednesday until after the holiday break because of reports of people seeing a man with a gun near a school.
• Two other Oklahoma school districts canceled classes Friday because of threats and rumors of possible violence.
• In Michigan, dozens of schools closed Friday. Many were related to Mayan doomsday rumors, but some arrests have also been made for students making threats on Facebook or telling classmates they’d bring a gun to school.