Princess Cruises has been forced to cancel a cruise by new ship Royal Princess after it lost power in the Mediterranean.

The ship suffered from a power outage yesterday while sailing between Mykonos and Naples.

The vessel, carrying 3,594 passengers and 1,336 crew, was on the seventh day of a 12-day voyage from Venice.

Power was reported to have been out for around three and a half hours.

A statement from the US line confirmed that the cruise will be cancelled after the ship arrives in Naples tomorrow evening (Tuesday).

It is not yet known what impact there will be on the next cruise, due to depart from Barcelona on September 27.

Passengers in the current voyage will receive a full refund along with a 25% future cruise credit.

The US line said: “The ship’s technical team continued to evaluate the problem overnight and, upon further assessment, it became apparent that repairs need to be made to fully resolve the situation.

“We sincerely regret this means the remainder of the current cruise will be cancelled, and passengers will disembark the ship in Naples.

“Princess is making homeward air arrangements for passengers, and we anticipate that passengers will spend Tuesday night onboard and depart the ship on Wednesday.”

The company added: “We have dispatched a care team to Naples to ensure that all our passengers are provided with any assistance they may require.

“The impact of the repairs on the next Royal Princess cruise, scheduled to depart from Barcelona on September 27, is not yet known and we will keep passengers fully advised as details become known.

“Once again, we are deeply sorry for this unanticipated disruption of our passengers’ vacation plans, and we appreciate their patience and understanding of these circumstances.”

Royal Princess experienced a power outage at lunchtime on Sunday.

“During the power outage, an emergency backup generator was used to provide essential services, such as toilets,” the company said.

“The ship is not in any danger, and the captain has been keeping passengers regularly informed about the situation.”

The 141,000-ton vessel was named by the Duchess of Cambridge in June in Southampton.