Updated

New York City police say an 18th century cannon was found loaded with gun powder and a cannon ball during a routine cleaning at the Central Park Conservancy.

Police say residual gun powder was spotted after a piece of rust was removed Friday from the cannon, exposing the cannon ball. Authorities were summoned to remove the gun powder and make the cannon safe for public display. The cannon came from a British Royal Navy Ship, the HMS, circa 1763 to 1780.

Packing material, gun powder and a cannon ball are occasionally found inside cemented cannons when they are X-rayed during routine cleaning. A spokeswoman for the Central Park conservancy had no comment.