The Lake City Police Department is investigating an elementary school playground fire. 

It happened around 8:30 p.m. Monday when a group of kids lit cardboard on fire and dragged it under a swing set, Girard School District Superintendent David Koma said. 

The fire spread to the mulch and swing set. 

Koma said, at this point, the damage looks to be less than $2 thousand. The swings might not need to be replaced, either. 

He said to contact police with any information.