Human remains are believed to have been found in wreckage of the Titan submersible, the US Coast Guard has announced.
Pieces of the sub, which imploded while on a deep dive to the Titanic, have been recovered from the seabed.
Coast Guard officials say the wreckage includes the sub's landing frame and a rear cover .
US medical professionals are to conduct a formal analysis of what is believed to be human remains.
All five people on board the vessel died on 18 June after it imploded about 90 minutes into a dive to view the 1912 shipwreck, which lies at a depth of 3,800m in the north Atlantic.
Those on board were 61-year-old Stockton Rush; British explorer Hamish Harding, 58; Shahzada Dawood, 48, and his son, Suleman Dawood, 19; and French diver Paul-Henry Nargeolet who was 77.
Huw Edwards presents BBC News at Ten reporting by Jonathan Amos.