Divers are expected to continue searching for at least 21 people missing for a week from a wrecked cruise ship off Italy's northwestern coast.

Officials are worried that bad weather might shake the Costa Concordia, causing the partially-submerged 114,000-ton ship to move off its rocky resting place and slide into deeper water.

Inclement weather might also delay efforts to remove thousands of tons of fuel from the ship, an effort to prevent leaks that might cause an environmental disaster along the Tuscan coast.

The vessel, which is owned by U.S. based Carnival Corporation, ran aground last Friday and flipped on its side.

Official say at least 11 people died in the accident. On Thursday, Italian authorities identified two of the bodies found as French nationals.

Carnival said late Thursday it will conduct a comprehensive audit of all ten of its cruise lines to review safety standards and procedures following the Concordia accident.

The world's largest cruise line says it will consult with a panel of emergency response experts to review the circumstances of accident.

The $450 million Costa Concordia cruise ship was carrying more than 4,200 passengers and crew when it ran aground.