Rescuers found another body in the wreck of the Costa Concordia early today, bringing to seven the death toll after the liner ran aground off the coast of Italy, daily La Stampa said on its website as the captain faced interrogation.

The body had not yet been recovered, the report said, quoting rescuers. A further 28 people remain missing.

Rescuers are continuing to comb the partly submerged wreckage of the giant vessel, a day after the head of the Italian coastguard, Marco Brusco, said there was "a glimmer of hope" for finding more survivors.

Speaking before the latest body was found, Brusco said four crew members and 25 tourists including six Italians remained unaccounted for.

A German official said 10 Germans were still missing while two French couples and two US nationals were among those unaccounted for.

Six bodies had earlier been found in the Costa Concordia, which came to grief off the picturesque island of Giglio in Tuscany late on Friday.

Three victims -- two French passengers and one Peruvian crew member -- drowned after jumping into the chilly Mediterranean waters to escape.

Rodolfo Raiteri, head of the coastguard service's diving team, told AFP on the shore: "The conditions inside are disastrous. It's very difficult. The corridors are cluttered and it's hard for the divers to swim through."

Choppy seas forced a temporary evacuation of the stricken 17-deck cruise ship for several hours on Monday after it slipped on a rocky shelf under the sea, sparking fears that the hulk could sink entirely.

Giglio mayor Sergio Ortelli warned that the stricken vessel, which hit submerged rocks and keeled over off the island holiday spot, was an "ecological timebomb" in the pristine waters of a marine nature reserve.

The head of the company that owns the vessel said it had hit a rock as a result of an "inexplicable" error by the captain, Francesco Schettino, who was arrested on Saturday along with first officer Ciro Ambrosio.

"He carried out a manoeuvre which had not been approved by us and we disassociate ourselves from such behaviour," said Pier Luigi Foschi, the boss of Costa Crociere, Europe's largest cruise operator.

Italian prosecutors accuse Schettino and Ambrosio of multiple manslaughter and abandoning ship before all the passengers were rescued.

A transcript of a conversation between Schettino and a port official was released yesterday showing that the captain refused to return to the ship.

"You must tell us how many people, children, women and passengers are there and the exact number of each category," the official tells Schettino, according to the transcript of the conversation on one of the ship's "black boxes".

"What are you doing? Are you abandoning the rescue?" the official says.

The Costa Concordia was carrying more than 4,200 people when it ran aground shortly after starting a seven-day Mediterranean cruise on its way to Marseille in France and Barcelona in Spain, just as many passengers were having dinner.

Island residents have already said the ship was sailing far too close to Giglio and had hit a reef known as the School Rocks, well known to inhabitants.

The Corriere della Sera reported Monday that the captain had passed close to the island's rocky shores to please the head waiter who comes from Giglio.

It also quoted witnesses as claiming the waiter had warned Schettino just before the accident happened: "Careful, we are extremely close to the shore."

Crews on Monday put down anti-spill booms as fears of a leak of the ship's 2,380 tons of fuel rose and local officials called for strict curbs in the future on shipping routes in an area of outstanding natural beauty.

A Dutch company specialising in salvage operations, Smit, is to begin pumping out the fuel this week. Officials said the ship itself could then be taken off Giglio in an unprecedented operation using massive floating devices.

Passengers meanwhile described confusion on board as the lights went out and how they were at first told it was just an electrical fault -- before the ship lurched sharply on to its side and panic set in.

Rose Metcalf, a 23-year-old crew member, wiped away tears as she told how she wrote a note to her mother in case she did not survive.

"There was absolute panic. It was just terrifying, I was just trying to keep people calm. People were white, people were crying, screaming," she told BBC television on her return to England.

Ennio Aquilino, a fire brigade chief who was one of the first on the scene and still bore the scars from a fall during the rescue operation as he saved a French woman, said it had been "an apocalyptic scene."