Customer tosses smoke grenade through McDonald's drive-thru window

Authorities say they think this was a prank.

DEKALB COUNTY, Ga. — A DeKalb County McDonald's is working to re-open after someone tossed a smoke grenade through a drive-thru window.

Police told Channel 2 Action News a customer placed an order at the restaurant on North Druid Hills Monday evening.

They said after paying for the food, the customer threw the device inside and sped off in a dark SUV.

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Officials described it as a grenade that produces smoke that is normally used during paintball games.

Maj. Brandon Gurley said it was "a commercial-type smoke grenade that can be purchased online or any fireworks, paintball, airsoft-type facility."

Police said the smoke bomb did not hurt anyone, but it caused some frightening moments.

Investigators are looking at surveillance video to identify the vehicle