Costa Concordia human remains believed to be found October 8, 2013 -- Updated 1555 GMT (2355 HKT) The Costa Concordia disaster Of 32 declared dead in the Costa Concordia accident, two bodies have yet to be recovered The cruise ship struck rocks off Italy's Giglio Island in January 2012 Engineers rotated the ship back to vertical last month (CNN) -- Divers have found what they believe are human remains on the wrecked Costa Concordia cruise ship, the Italian Civil Protection agency announced Tuesday. The bodies of two people from the 2012 wreck have never been found: Russel Rebello of India and Maria Grazia Trecarichi of Sicily have been missing but presumed dead. Their bodies have long been believed to be either trapped beneath or inside the ship. Italian authorities also said two weeks ago that divers found what they thought were human remains on the ship's Deck 4. But they later determined that the remains were animal. The cruise liner capsized after it struck rocks off Italy's Giglio Island in the Tyrrhenian Sea in January 2012, killing 32 of 4,200 people on board. The toll includes Rebello and Trecarichi. Rebello, 33, was a cruise waiter who was last seen helping passengers off the ship. Trecarichi was on the cruise to celebrate her 50th birthday with her 17-year-old daughter, who survived. The new discovery of remains comes about three weeks after engineers managed to rotate the ship back to vertical. Before that, the ship rested 20 months on its side, hindering a full examination. Costa Concordia righted Authorities say the ship struck the rocks off Giglio Island after the captain, Francesco Schettino, ordered the liner to veer more than four miles off course to salute a former sea captain who had retired on Giglio. Schettino faces charges of manslaughter, causing a maritime disaster and abandoning ship with passengers still on board. His trial, which began with preliminary hearings in March, resumed last month. The trial is expected to last through the fall with a string of witnesses, including passengers, crew members and islanders, who say they saw the captain on shore looking for dry socks before all the passengers had been safely evacuated. Schettino argues that he is a hero who saved the lives of more than 4,000 people, not a villain whose negligence led to the deaths of 32. His defense is trying to prove, among other things, that the ship's watertight doors did not function properly, and that is the reason the ship sank, leading to all 32 deaths during evacuation. Schettino also has told the court that the ship would not have crashed had his helmsman turned it in the direction that Schettino told him to 13 seconds before impact. The helmsman, Jacob Rusli Bin, and four others were convicted in a plea deal in July for their role in the disaster. A Florence court is considering the validity of those plea bargain agreements. CNN's Hada Messia, Jason Hanna and Barbie Latza Nadeau contributed to this report. September 17, 2013 -- Updated 1409 GMT (2209 HKT) After an ambitious salvage attempt, the wrecked cruise ship the Costa Concorda is now standing upright, engineers announce. September 16, 2013 -- Updated 1736 GMT (0136 HKT) The nautical blue paint spelling out "Costa Concordia" has almost all bubbled and chipped off the bow of the once luxurious cruise liner. September 16, 2013 -- Updated 1521 GMT (2321 HKT) The passengers weren't the only people whose lives were transformed by the Concordia disaster. So was the island/ September 16, 2013 -- Updated 1523 GMT (2323 HKT) Nick Sloane: Has master mariner in charge of salvage met his match in the Costa Concordia? September 17, 2013 -- Updated 1123 GMT (1923 HKT) Browse our interactive to see how one of the largest cruise liners ever built will finally be raised from the Italian sea bed. July 22, 2013 -- Updated 0116 GMT (0916 HKT) Five people were convicted of multiple manslaughter and causing personal injury over the deadly wreck of the Costa Concordia. July 8, 2012 -- Updated 1911 GMT (0311 HKT) The Costa Concordia disaster has brought changes to cruise industry safety while focusing on how some international companies operate. July 6, 2012 -- Updated 1654 GMT (0054 HKT) CNN's Dan Rivers asks: how could this happen, nearly 100 years after the Titanic? June 27, 2012 -- Updated 1745 GMT (0145 HKT) Two of the largest cruise ship industry organizations have announced new safety policies in the event of an emergency at sea. February 10, 2012 -- Updated 2129 GMT (0529 HKT) Cruise lines are now required to conduct passenger safety drills before leaving port, under a rule announced by three cruise industry associations. January 24, 2012 -- Updated 2255 GMT (0655 HKT) The cruise line issued a statement denying it offered discounts on future cruises to passengers affected by the tragedy. January 20, 2012 -- Updated 2216 GMT (0616 HKT) Days after the Costa Concordia ran aground, details of the harrowing escape from the ship are still fresh in survivors' minds. March 7, 2013 -- Updated 2033 GMT (0433 HKT) The island of Giglio is made famous for the tragedy on its shores, says CNN's Dan Rivers. January 16, 2012 -- Updated 1336 GMT (2136 HKT) The disaster that killed 32 passengers left officials and experts on maritime navigation searching for answers -- fast.