Italian firefighters and investigators have been granted access to a Greek ferry which was towed to the port of Brindisi after catching fire in the Adriatic Sea.
Associated Press reports that they have discovered a data recorder which could provide more information about the deadly blaze.
A criminal investigation is underway to find out how the Norman Atlantic car ferry caught fire last Sunday.
The ship's captain and the head of the company which built the ferry are all being questioned.
Hundreds of people were trapped on board and at least eleven are known to have died in the disaster.
Passengers and crew were forced to huddle on the top deck of the ferry as they tried to avoid the flames and smoke rising from one of the ferry's car decks.
There have been conflicting reports about the amount of people unaccounted for, with Greek authorities estimating the number to be 19. Italy says 477 people were rescued from the ferry.
Investigators have been unable to reach the car deck which caught on fire, as vehicles are still said to be burnincloseg. It is feared more bodies, potentially of unregistered migrants, could be discovered on the deck when it can finally be accessed.
"For the time being, it is unfortunately impossible to get inside... For safety reasons, we cannot verity firsthand what's inside," prosecutor Ettore Cardinali told reporters.
