KALAMAZOO, MI (WKZO) -- Kalamazoo County deputies are investigating a possible chemical attack at the McDonalds on West Main early Sunday morning.  Someone in what was believed to be a white Chevy discharged what may have been a fire extinguisher through the drive-thru window at about 3:30 Sunday morning after paying for their food and having it handed to them.

The three employees complained of burning eyes and skin but the symptoms quickly went away, and they were treated at the scene.

They are going through surveillance tapes of businesses in the area to see if they can spot the car.  There usually isn’t a lot of traffic in the area at that time of night.