ROME (CNN) -- Four more bodies were found aboard the shipwrecked Costa Concordia, Italian civil protection officials said Wednesday, more than a month after the cruise liner struck rocks off the coast of Italy.
The discovery raises the number of confirmed dead to 20, with 12 people still missing of the roughly 4,200 on board.
The ship struck the rocks January 13 and rolled onto its side off the Italian island of Giglio.
Its Italian captain, Francesco Schettino, remains under house arrest while investigators examine possible charges against him.
Earlier this month, a Florence, Italy, court rejected a prosecution motion that Schettino be jailed as well as a defense motion that he be freed, according to attorney Alessandro Antichi.
The captain faces possible charges of manslaughter, shipwreck and abandoning ship in connection with the incident.
Schettino has said managers of the cruise line instructed him to sail close to the island and has denied allegations that he was sailing too fast. He has said the rock the ship struck was not indicated on his charts of the area.
PHOTOS: Search for survivors on Italian cruise ship
CNN