MAR DEL PLATA, Argentina: Argentina’s navy confirmed Thursday that an unusual noise heard in the Atlantic near the last known position of a missing submarine appeared to be an explosion, dashing the last hopes of finding the vessel’s 44 crew members alive. Relatives of the missing sailors reacted with grief and anger to the news after holding out hope since the sub was reported overdue at its Mar del Plata base on November 17, two days after the explosion. “An anomalous, singular, short, violent and non-nuclear event consistent with an explosion,” occurred shortly after the submarine’s last communication, navy spokesman Captain Enrique Balbi told a news conference in Buenos Aires. After days of false hopes, some of the relatives said the navy had withheld information about the sub and lied to them over the past week. Underwater sounds detected in the first days of the search by two Argentine search ships were determined to originate from a sea creature, not the vessel. Satellite signals were also determined to be false alarms.