Memphis police say the person clad with a clown costume and another person got away with an undisclosed amount of cash.
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Fortunately, no one was hurt, but officers say they are concerned the tactic may lead to copycat actions.
The robbery is the latest in a string of clown-related incidents across the country.
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Police say the clown pranks could turn into a deadly situation because of fear.
Clowns allegedly terrorize children near bus stop