A Michigan playground and all other nearby public parks are closed while investigators determine the safety of the recreational areas after making an unsettling discovery.
Howe Park, a playground in Eaton Rapids, closed this week after people in the neighborhood found nearly 40 razor blades scattered around the playground, Detroit-based WXYZ-TV reported.
Law enforcement officials who responded to the situation said the razors appeared to have been placed on slides and other equipment with intent to harm.
The city is offering a $1,000 reward for any information that leads to the arrest and conviction of whoever planted the razor blades, WXYZ-TV reported.
Witnesses told police they saw four teenagers who might be responsible.