It has been revealed, this morning, that a noise heard within the vicinity of the missing submarine, just three hours after the last contact was consistent with an explosion according to the UK Defence Journal.
A multi-nation search operation was mounted to try to locate the submarine which was believed to have suffered an electrical malfunction.
The Argentinian Navy has now reported that they believe the submarine may have exploded, killing all 44 crew.
Experts say even if the ARA San Juan is intact, its crew might have had only enough oxygen to last seven to 7 days. The German-built diesel-electric sub went missing as it sailed from the extreme southern port of Ushuaia to the city of Mar del Plata, about 250 miles southeast of Buenos Aires.
Argentine Navy spokesman Enrique Balbi said evidence showed “an anomalous event that was singular, short, violent and non-nuclear that was consistent with an explosion.”
“According to this report, there was an explosion,” Mr Balbi told reporters.