The CNN 's detonation of a mine-like device shoots water several hundred pounds high . How the device weighing 100 feet got near coast is unclear . The device , suspected to be either a moored or contact mine , was discovered Tuesday evening by a swimmer off the coast of Bay Head , about halfway between New York City and Atlantic City . Fifteen families were evacuated as a precaution ; no one was injured . Leftover parts of the device will be analyzed for information about its origin .
The CNN 's detonation of a mine-like device shoots water several hundred pounds high . How the device weighing 100 feet got near coast is unclear . Fifteen families were evacuated as a precaution ; no one was injured . Leftover parts of the device will be analyzed for information about its origin .