In October, the Canadian Coast Guard cleaned up tar balls floating to the ocean's surface from the site of a World War II era shipwreck off the coast of British Columbia, the Canadian Broadcasting Co. reported. The U.S. Army military transport ship has been leaking oil over the years since it hit a rock and sunk in 1946, the news outlet reported.

At 7:05 p.m. Saturday, the Coast Guard’s Southeast District posted to social media that “Coast Guard air and surface crews completed searches from Palm beach to Port Everglades for the source of the tar balls. The source remains unknown. Further assessment will continue at first light with our partner agencies.”

Coast Guard Crews investigated reports of tar balls from Port Everglades to Palm Beach along the coast of the Atlantic Ocean.

What's the source of the dark goop washing up on Florida's beaches? The U.S. Coast Guard is scanning the shores from Port Everglades to Palm Beach after locals reported sticky balls of sludge amid the sands.