A ship with 100 people on board has run aground near a busy harbour entrance.
Coastguards said the diving support vessel Bibby Topaz is thought to have struck a rocky outcrop at the entrance of Lerwick harbour in Shetland.
There were no reports of injuries and the ship is not taking on water.
A spokesman for Shetland Coastguard said: "Lerwick harbour are dealing with the situation and coastguard are assisting.
"We were contacted at 3.15am. We think it's a rocky outcrop directly in the northern harbour entrance to Lerwick.
"There were no injuries and no pollution. The harbour and shipping management are organising a tow. There are a total of 100 people onboard. They are still onboard."
Attempts to re-float the vessel are expected to be made at high-tide.
A spokesman for Aberdeen-based Bibby Offshore, operators of the ship, said: "The vessel went aground whilst departing Lerwick harbour in the Shetland Isles early this morning.
"None of the crew were injured in the incident and there has been no outflow of fuel or other pollution. The vessel, which had a pilot on board and the assistance of a manoeuvring tug at the time, is aground by the bow some 200 metres (600ft) from the shore. Bibby Offshore are working with the authorities and expert parties to ensure that the vessel is refloated in a safe and timely manner."
The Bibby Topaz is described as a multi-role offshore diving support ship, is 106 metres (347ft) long and was built in 2008.