SALEM, Mass. (UPI) -- Police officers in North Andover, Mass., inadvertently interrupted a movie set thinking it was the site of a robbery attempt, a director says.

Director John Depew said he was filming a scene at a North Andover convenience store last weekend when police suddenly stormed in to apprehend their suspects, Boston's WCVB-TV reported.

"They came in and they said, 'Drop the gun' and I couldn't see the officer because he was behind (me)," Depew said. "I said, 'It's a movie, it's a movie -- we're filming a movie!'"

Depew said two actors playing robbers were placed in handcuffs by the officers, but were released after the situation was explained.

WCVB-TV said the confusion was brought about by a mistaken 911 call from someone who said an actual robbery was taking place at the store.

Oops!!!!