An investigation has been launched after a fire broke out on the fifth deck of the 930-guest Viking Orion while it was in Sydney harbour.

The New South Wales fire and rescue service (FRNSW) said passengers were evacuated from decks five and six ‘as a precaution’.

However, FFRNSW Superintendent Adam Dewberry said the ship’s crew were able to contain the fire while they waited for the fire service to arrive.

Two people were treated for smoke inhalation at the scene by paramedics.

FRNSW said it is working with Viking Orion’s captain and crew to investigate the cause of the fire.

In a statement, Viking said: “We can confirm that a small fire occurred in a guest stateroom on board the Viking Orion while the ship was docked in Sydney the morning of February 3. The fire was extinguished within minutes by the ship’s crew, and there were no injuries.

“Viking is fully investigating the incident, and early reports indicate the cause of the fire was electrical, possibly from a corded device. All scheduled operations on board the Viking Orion have continued, and we do not expect any disruption to the current voyage.”