Navy Reveals Grim Development in Search for Missing Sub

Hope turned to anger and despair for the families of 44 missing submariners Thursday after the Argentine navy shared news of a grim development. The navy said that a "hydro-acoustic anomaly" detected by the US Navy and a nuclear test-ban monitoring organization soon after the ARA San Juan was last heard from Nov. 15 was apparently an explosion, the BBC reports. 

Navy spokesman Enrique Balbi said the explosion was recorded near the sub's last known location and was "singular, short, violent, and non-nuclear." He said the cause of the apparent explosion is unknown and the search will continue until the vessel's fate is known. Relatives at the Mar del Plata base were seen collapsing in tears.

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