Salvage crews prepare to pump fuel from wrecked Italian liner GIGLIO, Italy (Reuters) - Salvage crews began preparations on Tuesday to pump thousands of tonnes of fuel from the wreck of the Costa Concordia as the search continued for bodies, 11 days after the giant Italian cruise liner struck a rock and capsized. Fifteen bodies have been recovered and divers are continuing to search for at least 17 more missing on the 290-metre long vessel, which lies half-submerged on its side just outside the tiny island port of Giglio off the Tuscan coast. Dutch salvage company SMIT brought a barge carrying defueling equipment alongside the giant hulk as divers worked on installing external tanks that will be used to hold more than 2,300 tonnes of diesel that must be pumped out of the Concordia. Navy explosive experts also blasted a hole into the submerged third deck of the ship to allow divers to continue the search of the vessel after the bodies of two so-far unidentified women were found on Tuesday. "While this operation is underway, rescue efforts are continuing simultaneously," fire services spokesman Claudio Chiavacci said. Authorities have been increasingly concerned at the threat of an oil spill in the marine reserve where the accident occurred but work on removing diesel and lubricant oil has been delayed by the search for survivors and bodies. Preparations to begin pumping the oil are expected to take about two days and the actual work of removing the fuel from the giant liner's 17 fuel tanks will take another 28 days. Officials dismissed reports that oil had started to leak out of the ship, saying that monitoring equipment had shown no significant pollution spreading from the wreck. As the work on Giglio continued into a second week, magistrates investigating the accident are expected to extend their inquiries, with attention increasingly focused on the ship's operators, Costa Cruises. The ship's captain, Francesco Schettino has been blamed for the accident and placed under house arrest, accused of multiple manslaughter and abandoning ship before the evacuation of more than 4,200 passengers and crew was complete. But his lawyer said on Monday that the investigation would be extended to other officials of Costa, a unit of the world's largest cruise operator Carnival Corp. Costa said on Tuesday it had not been notified that it was under investigation but would cooperate fully with investigators and had full confidence in magistrates. In interviews, the company has placed the blame for the accident squarely on the shoulders of the 51 year-old Schettino, who told investigators he brought the ship close into shore to perform a maneuver known as a "salute" to the island. Whether or not such maneuvers were known about and encouraged by Costa has been disputed but there are also questions about when Schettino informed the company of what had happened after the ship was holed by a rock. Schettino's lawyer has said his client is ready to assume his share of responsibility for the accident but he has said he was in constant touch with Costa's command centre during the including the evacuation of the ship. Additional reporting by Cristiano Corvino and Sara Rossi in Milan, Writing By James Mackenzie; Editing by Giles Elgood