Parts of the OceanGate submersible, which embarked on the ill-fated deep sea tour to see the wrecks of the Titanic, have been recovered and brought to land for the first time.

Metal wreckage of the OceanGate submersible arrived aboard the Horizon Arctic ship in St John’s, Canada, on Wednesday. Photos by newsmen showed the unloading of the metal wreckage by the United States Coast Guard.

The submersible, which conveyed five people to see the wrecks of the Titanic, went missing for days, prompting a search that led to the discovery of parts of the submersible, suggesting an implosion that killed everyone on board.

According to the U.S. coast guards, the Titan’s landing frame and rear cover were found amongst the debris.

The BBC reports that the OceanGate submersible imploded on the 18th of June, about 90 minutes after its dive, killing all five people who embarked on the journey hoping to see the famous 1912 Titanic shipwreck, which currently lies at a depth of 12,500ft in the North Atlantic Ocean.

The debris recovered and brought ashore includes at least one titanium end cap, the sub’s porthole with its window missing, as well as a titanium ring, landing frame, and the end equipment bay.

The U.S. coast guards have officially launched an investigation to determine what led to the implosion of the submersible. They hope to make findings and make recommendations that would prevent future tragedies.

The founder of the deep diving company Stockton Rush, British explorer Hamish Harding, French Diver Paul-Henry Nargeolet, Shahzada Dawood, and his son, Suleman Dawood, all died in the incident.