WATCH: Dairy Queen drive-thru customer seen throwing soda at employee

ATLANTA, Ga. (Atlanta News First) — Police are investigating after a customer was caught on camera attacking a manager at a Powder Springs Dairy Queen on Tuesday.

At the fast food restaurant on Austell-Powder Springs Road, the driver threw a Dr. Pepper at the drive-thru window after he claimed the employees messed up his milkshake order, security footage shows.

“We appreciate your help in holding people accountable and keeping our workplace safe….over a milkshake he claimed was not a milkshake," Dairy Queen said in a Facebook post.

“He needs anger management. He really really does need some help. Because it was very obvious, he was angry before he got here. We just triggered it,” said Lisa Green, store manager.

If anyone has information that could help identify the driver, text Dairy Queen at (678) 769-5362.

This is a developing story. Check back with Atlanta News First as we learn more.