MIAMI (POP America) -- Passengers onboard a cruise ship docked at the Port of Miami were placed on lockdown yesterday after a bomb scare was reported by federal officials. Screeners with the Transportation Security Administration spotted what they thought was a grenade in the luggage of a passenger on Royal Caribbean's Freedom of the Seas. The ship had just docked at the port after an eastern Caribbean cruise. Officials quickly evacuated Terminal G of the port and passengers on the ship were not allowed to disembark as members of the bomb squad were called in to dispose of the device. The all-clear was given when authorities determined the so-called "explosive" was actually a child's belt buckle shaped like a grenade. Passengers were allowed to leave the ship a short time later.