Subscribe | UPI Odd Newsletter Subscribe April 5 (UPI) -- A Florida sheriff's deputy patrolling on a popular beach made an unexpected discovery: a naval mine washed up in the sand. The Broward County Sheriff's Office said a patrolling deputy discovered the suspected military explosive training device washed up on the beach early Sunday morning in Lauderdale-by-the-Sea. Advertisement The mine had the word "inert" written on it, indicating it was likely a dummy mine for training purposes, but experts said the word is not a guarantee that the mine wasn't an active explosive. The sheriff's office bomb squad and U.S. Air Force personnel were summoned to the scene. The mine was carefully moved from the sand to a trailer. It was taken away by the Air Force for further investigation. Read More Loose cow brings traffic to a halt on Georgia highway Pooches brave the waves at Dog Surfing Championships in Florida Sealed copy of 'Super Mario Bros.' sells for record price of $660,000