WALKER, MI - The West Michigan Academy of Environmental Science was locked down after an email threat and later dismissed early, according to Walker Police Department.

According to the police, the threat against the charter school, located at 4463 Leonard St. NW, was reported at 11:55 a.m., but not deemed credible. However, the school decided to dismiss students.

The exact nature of the threat or who it was sent to were not immediately available. The academy serves 751 students, from preschool through 12th grade.

A local preschool was also affected by the threat.

In a 1:45 p.m. email, officials with AppleTree Early Care and Preschool, located at 53 Lake Michigan Dr., notified families it was advised to go on a precautionary soft lock down by the Walker Police Department, after being contacted about a local elementary school threat.

"We were reassured there is no direct threat to our school,'' wrote Margaret Brownell, co-director of Appletree.

"Our doors will remain locked with shades drawn but you are welcome to come pick up at any time."

However, the police had no comment regarding calls made to surrounding schools related to the threat.

Michigan has seen a wave of school threats since the 17 people - 14 students and three educators- were killed in a mass shooting Feb. 14, at Marjory Stoneman Douglas High School in Parkland, Florida.

Central Montcalm Schools were closed Wednesday, March 28, due to a potential threat.

Last week, a threat forced Hastings Area Schools to cancel classed on Friday, March 23. The type of threat or how it was delivered was not disclosed but it was the second this month to shutdown the district.

A 17-year-old was to charged for allegedly making a false threat against Hastings. Police say he left a note in a high school bathroom that led to classes being cancelled on March 5. Barry County prosecutors recently authorized charges.