Authorities were involved in two separate investigations involving threats believed to involve Southeast Michigan school districts.

Howell Public Schools

A person has been questioned, with no arrest as of yet, over a threatening social media post that resulted in closing Monday of Howell Public Schools in Livingston County.

The school district issued the closing notice early in the morning, after learning of "a social media message circulating that referenced a threat of violence against Howell High School. "As soon as we were alerted to this, an investigation was launched, and law enforcement was involved. At this time, law enforcement needs additional time to thoroughly investigate this matter," the district said.  

And with that, the school closing notice for Monday was issued. 

Howell Police Chief Michael Dunn provided further details later in the day. Dunn said that police officers had become aware of a TikTok social media post Sunday night that "indicated an intent by the author to conduct a shooting at the Howell High School this week." In response the department's road patrol contacted the Howell Police Department School Resource Officer, who began an investigation.

The School Resource Officer worked with an agent from the FBI Detroit office to investigate the circumstances, after which authorities contacted residents of a home in Marion Township about the social media post.

A person "did confess to posting the TikTok but that there were no intentions of carrying out any form of violence as it was intended as a joke," Dunn said.

No weapons were found at the home, and there appeared to be no further "potential threats to the public or schools."

The investigation will be forwarded to the Livingston County Prosecutor's Office for review. "Based on the age of the offender, no arrest was made at this time," Dunn said.

"We take these types of threats of violence against our children very seriously and sympathize with all of the families affected by the poor choices made by one individual."

Hazel Park Schools

In the meantime, Hazel Park Schools in Oakland County said an arrest was made in the aftermath of a possible threat at its high school that authorities learned about late Sunday. 

"Our students and family members alerted the proper authorities of the situation, and they were able to investigate it properly to pinpoint who made the threat and took immediate action to put an end to it. The student who made the threat is currently in custody. There are no threats to the community or the student body," Hazel Park Superintendent Amy Wilcox said. 

Given the status of the investigation, classes are in session as scheduled Monday at Hazel Park. 

"Hazel Park Schools takes any threat very seriously and are thankful for the action taken to alert us to this situation. A safe and welcoming school is the responsibility of all of us. Please encourage your child to say something if they see or hear something or report it through our online reporting tool, OK2Say. We will investigate everything reported fully, and students will face consequences that could include potential expulsion," the district said. 

OK2SAY hotline

Michigan's school safety hotline and tip program, OK2SAY, launched in 2014 as a way to confidentially report possible criminal activity or harm directed to students, schools or school employees. There have been over 8,000 tips reported to the hotline on topics such as bullying, alcohol use or fights so far this year.