"The ARA San Juan went missing 430km (270 miles) off the Argentine coast on 15 November 2017, and was located a year and a day later.
Officials said the vessel was lying 900m (2,950ft) below the surface.

Relatives of the crew are demanding that the government raise the wreck.

Navy commander Gabriel Attis has confirmed that the submarine imploded. He said the hull was "totally deformed, collapsed" and that debris was scattered over an area of about 70m (229ft)."

Comment: Analysis of the CTBTO acoustic data indicated collapse occurred at a depth of 468m (1536 feet) in 35 milliseconds.