NEW : Second hijacked ship also sunk . Pirates release Saudi - owned oil supertanker after receiving ransom . All crew members on Sirius 2 are safe , according to piracy reports . Some were drowned , some were lost after skiff capsized in rough seas .
NEW : Second hijacked ship also released . Pirates release Saudi-owned oil supertanker after receiving ransom . All crew members on Sirius Star are safe , according to piracy monitor . Four pirates drowned , some ransom lost after skiff capsized in rough seas .