Costa CEO blames captain error for grounding ROME (AP) - The chief executive of Costa Crociere has blamed "human error" on the part of the captain for the grounding of its cruise ship off Tuscany. Costa chairman and CEO Pier Luigi Foschi told a press conference Monday that the liner had passed all safety and technical tests in its 2011 evaluation. He says the company's main concern was the safety and well-being of the passengers and crew, as well as to ensure fuel doesn't leak out from the upended hull into the pristine waters off the island of Giglio. The Costa Concordia ran into a reef Friday night and capsized into the port area of Giglio, sparking a frantic evacuation of 4,200 passengers and crew. ROME (AP) - Rescuers raced against time and increasingly turbulent waters Monday in search of survivors from the capsized Costa Concordia cruise ship off the Tuscan coast, while prosecutors focused on the captain, who is accused of abandoning the ship well before passengers were safely evacuated. A sixth body was discovered in the overturned vessel as the rescue mission entered its third day; 16 passengers and crew were still missing after the ship carrying 4,200 struck a reef off the island of Giglio. The body of the male passenger was spotted in a corridor of the part of the Costa Concordia still above water, fire department spokesman Luca Cari said. The victim was wearing a life vest. "We are still working to pull the body out of the ship," Cari told The Associated Press. The sea conditions make it difficult to get into the ship. The number of the missing was raised after relatives of two Sicilian women who had been listed among those safely evacuated after Friday night's grounding told authorities they not heard from them. Giglio Mayor Sergio Ortelli said rescuers were in "one of the most important phases" as they sought those who may have found an air pocket. The mission includes a risky inspection of the underwater half of the capsized ship. But, he conceded to Sky News 24, the chances of finding survivors was dwindling. Rising turbulence led to concerns Monday that the ship - which has on board some 2,500 tons of fuel - could become unstable, creating the threat of a possible environmental disaster on top of the human loss. No leaks into the pristine waters have been reported so far, and a Dutch firm has been called in to help extract the fuel. "The environmental risk for the island of Giglio is extremely high," said Environment Minister Corrado Clini said, according to the news agency ANSA. The goal is to avoid that the fuel leaks from the ship. We are working on this. The intervention is urgent. On Sunday, divers found the bodies of two elderly men. "The route of the vessel appears to have been too close to the shore, and the captain's judgment in handling the emergency appears to have not followed standard Costa procedures," Costa said in a statement. "At this time, our priority is the safety of our passengers and crew," Carnival CEO Micky Arison said in a statement. We are deeply saddened by this tragic event and our hearts go out to everyone affected by the grounding of the Costa Concordia and especially to the families and loved ones of those who lost their lives. Malin Rising in Stockholm, Sarah DiLorenzo in Paris, Gregorio Borgia in Giglio, Victor L. Simpson in Rome and Colleen Barry in Milan contributed.