Happening now:

Debris and presumed human remains from the Titan submersible have been recovered and returned to land, the U.S. Coast Guard announced Wednesday night, nearly a week after an international search-and-rescue operation ended and the vessel's five passengers were presumed dead.

At a Canadian Coast Guard pier in St. John's, Newfoundland, on Wednesday, crews unloaded what appeared to be the Titan's 22-foot hull, crinkled and twisted with exposed wires and cables. Images from The Canadian Press showed what looked to be a piece of the hull's siding and other debris being unloaded from the Horizon Arctic, a vessel that had deployed a remotely operated vehicle to search the ocean floor for the submersible.

The US Coast Guard said the debris and remains would be taken to an American port for study by the Marine Board of Investigation.

In a statement, Pelagic Research Services, which led the deep sea recovery effort, said it had "successfully completed offshore operations" and was in the process of demobilization, which marks the end of a mission and a return to the base of operations.

We'll update you as we learn more.