A ferry which ran aground leading to the evacuation of 60 passengers has been refloated and towed to its berth.
The MV Pentalina will now be surveyed to establish the extent of any damage and monitored for pollution, the coastguard said.
Pentland Ferries said smoke was detected in the engine room before the Pentalina became grounded off the village of St Margaret’s Hope.
Sixty passengers, including three children and an infant, were evacuated from the ferry as well as some of the crew.
It is understood eight crew members have remained on the vessel to help manage the situation.
A coastguard spokesman said: "The MV Pentalina was refloated at approximately 5.30am today after a tow was established by a tug whose services were acquired by Pentland Ferries.
"The Pentalina was brought alongside its berth in St Margaret’s Hope a short while later. HM Coastguard’s Emergency Towing Vessel MV Ievoli Black observed the operation, alongside counter-pollution officers, and reported that there were no signs of pollution.
"The vessel will be surveyed later today to establish the extent of any damage while the harbour master will continue to monitor for pollution. MAIB [Marine Accident Investigation Branch] has also been informed."
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Coastguard teams from St Margaret’s Hope, Stromness and Kirkwall and the Stromness and Longhope RNLI lifeboats were involved in the rescue operation after the mayday call at around 7.30pm on Saturday.
The fire was extinguished and passengers were evacuated by lifeboat to St Margaret's Hope, where the Scottish Ambulance Service and Police Scotland were waiting.
The coastguard said that all passengers have been reported safe and well.
The Pentalina returned to service earlier this week to allow another ferry, the MV Alfred, to service CalMac routes on the west coast of Scotland.
A statement from Pentland Ferries on Saturday evening said smoke was detected in the engine room before the vessel grounded, adding: “The safety of our passengers is, of course, our first priority.”
An RMT union spokesman said: “A thorough investigation will be needed to establish how this major incident aboard the Pentland Ferries vessel occurred.”
Transport Scotland said that the current priority is for Pentland Ferries to assess the condition of the vessel and any next steps to determine whether there will be any loss of services on the Pentland Firth.
Meanwhile, local politicians are calling for answers from the Scottish Government over what the incident means for ferry users in Orkney.
Orkney MSP Liam McArthur said there are important questions for the Maritime and Coastguard Agency to answer as he said it had recently inspected and certified the Pentalina as fit for service.
He added: "Answers are required too from the Scottish government whose failure to procure new ferries in a timely fashion has left services both in the north and on the west coast extremely vulnerable. As a result islanders and island communities are left paying the price."
An MCA spokesperson said: “The Maritime and Coastguard Agency, in conjunction with the vessel’s classification society, completed surveys on the vessel Pentalina on April 18 and issued a passenger ship safety certificate; at this time the vessel met the standards required for issue of this certificate.
“Surveyors from the MCA will be attending the vessel today (Sunday) in St Margaret’s Hope to undertake initial fact-finding to establish the cause and circumstances surrounding the incident which occurred on the evening of April 29.
“While the facts haven’t been established yet, initial reports from the operator point to the cause of the grounding being a sudden mechanical failure.”
A Transport Scotland spokesman said: “Ministers were quickly made aware of the incident involving the MV Pentalina and kept informed of developments throughout the night.
“We were relieved that all passengers and crew are safe and that arrangements were made to support passengers with onward travel.
“We would also like to express our appreciation to all those involved in the evacuation, including RNLI crews and other emergency services.”
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