Titanic sub debris: Photos give 1st look of implosion wreckage [Video]

PORTLAND, Maine — Human remains have likely been recovered from the wreckage of the submersible that imploded during an underwater voyage to view the Titanic, the U.S. Coast Guard said Wednesday.

The news came hours after the announcement that debris from the Titan, collected from the seafloor more than 12,000 feet (3,658 meters) below the surface of the North Atlantic, had arrived in St. John’s, Newfoundland. Twisted chunks of the submersible were unloaded at a Canadian Coast Guard pier.

Recovering and scrutinizing the wreckage is a key part of the investigation into why the Titan imploded last week, killing all five people on board. The multiday search and eventual recovery of debris from the 22-foot (6.7-meter) vessel captured the world’s attention.

“There is still a substantial amount of work to be done to understand the …