Several schools around the state closed Monday in response to threats made on social media over the weekend.
Four schools closed for the day, and one school has heightened security as a result.
University Prep Academy, University Prep Science and Math, Lake Orion High School, and Lincoln High School all closed Monday as a result of threats. Cass Technical High School in Detroit received a threat, but remained open as officials investigate.
Mark Ornstein, CEO of University Preps Schools, announced the closures on the school's Facebook page.
“While we believe this is not a credible threat, we erred on the side of caution by closing the schools on Monday, January 25, 2016 so that the proper authorities may investigate," he wrote.
Lake Orion High School posted on its website that the school is working with the Oakland County Sheriff’s Office after a “serious threat against” the school was made.
Joan Russ, administrative assistant to Superintendent Joe Pius, confirmed the closure of Lincoln High School in Warren to The Detroit News.
"There was a possible threat and we are investigating it. It was something on social media," Russ told the Detroit News.
Officials from Lincoln High School in Warren did not respond to Michigan Radio immediately for comment.
The Detroit Public Schools police department, Detroit Police Department, and the Department of Homeland Security are currently investigating an alleged threat made to Cass Technical High School, according to a post published on the DPS Facebook page.
As a result, Cass Tech has heightened security “to ensure that Cass Tech campus will be safe for all students, staff and the public,” the post read.
Chrystal Wilson, press secretary for Detroit Public Schools, said no Detroit Public Schools closed as a result of the threat.
- Jennifer Calfas, Michigan Radio Newsroom
