Armed pirates off the coast of Somalia have tried to board an Italian tanker for the second time in less than a week, Italian port authorities said. The failed attack occurred on Tuesday morning about 137km from Somalia's coast and lasted only a few minutes, said First Sergeant Massimo Maccheroni, a spokesman for Italy's central port authority in Rome. None of the crew was harmed.Maccheroni said pirates on two small vessels fired at the ship and tried to board the 24,000-tonne Cielo di Milano, but the crew reacted swiftly, increasing speed and activating the ship's anti-fire system, which sends strong jets of water gushing out from the sides of the tanker. The Italian tanker was coming from the Red Sea and continued on its way to Mombasa, Kenya, Maccheroni said.