(CNN) The Argentine military believes an explosion caused last month’s disappearance of a naval submarine and that its 44 crew members perished in the South Atlantic, Defense Minister Oscar Aguad said.

Aguad said during an interview Monday on an Argentine television news program that international nuclear agencies detected what appeared to be a explosion near the last known location of the ARA San Juan when it disappeared November 15. The extreme conditions and passage of time likely means the sub’s crew did not survive. Continue reading.