A senior executive at the shipping company which owned a Greek ferry that sank in September killing 80 people, plunged to his death from the sixth floor of his office building on Wednesday, Reuters reported. Police said Pantelis Sfinias, vice president of the board of directors of Minoan Flying Dolphins, a subsidiary of Minoan Lines, was seen by passers-by and employees stepping off the building in the port of Piraeus. The Express Samina sank off the island of Paros with 500 people aboard in Greece's worst maritime tragedy in decades. Police said they believed Sfinias's death was a suicide. "When the ambulance arrived to take him to hospital he was already dead," a police official said. News of Sfinias's death shocked the company and the Athens Stock Exchange.