Man attempts to rob car wash with potato chip bag

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A man tried to rob a car wash in Northern California with an empty potato chip bag and an alleged handgun, authorities said.

Rohnert Park's Department of Public Safety said in a statement that the man entered KaCees World of Water car wash Friday night and dropped an empty potato chip bag on the counter.

He told the cashier to fill it with money, warning that he had a gun.

The man gestured that the weapon was in the empty bag, but the cashier saw it held only a piece of cardboard and called a co-worker for help.

Police said when the other employee approached, the suspect fled on foot.