A Russian cargo ship called Ursa Major which sank in the Mediterranean Sea was the victim of "an act of terrorism," state news agency RIA cited the vessel's owner as saying on Wednesday. The ship, built in 2009, sank after an explosion ripped through its engine room and two of its 16 crew were missing, the Russia's Foreign Ministry said on Tuesday. RIA cited Oboronlogistika, the ship's ultimate owner and a company that is part of the Russian Defense Ministry's military construction operations, as saying the vessel had been targeted in "a terrorist act." Oboronlogistika had previously said that the ship had been en route to the Russian far eastern port of Vladivostok with two giant port cranes lashed to its deck.