Scores of land searchers and a lifeboat have joined the hunt for a missing 17-year-old school girl on the Isle of Lewis.
Hannah Mackenzie, from Gravir on the island, was last seen outside the Nicolson Institute school in Stornoway at 4pm on Thursday.
Police said she was intending to walk to the Western Isles Hospital in the town to meet somebody.
It is understood she was not attending the hospital as a patient.
Coastguards said there was a possible sighting of Hannah in the Stornoway Castle Grounds on Thursday night – and that is where the current search is concentrated.
Hannah is 5ft 5ins, slim, with dark hair in a ponytail. She was wearing a school sweatshirt, black trousers and a black jacket with white fur on the hood.
Anyone who has seen her or has any information as to her whereabouts has been urged to contact police “as a matter of urgency”.
Inspector Jane Nicolson said: “We are grateful to everyone who has been in contact so far with information and encourage anyone else who can help to get in touch.
“If Hannah herself is reading this then please get in touch and let us and your family know you are safe and well.
“You can call Stornoway Police Station with information by calling 101.”
Stornoway, Tarbert, Scarpay, Southlochs, Bressclete, Miavaig, Ness, Bragiar and Ness coastguard rescue teams, and the Stornoway Lifeboat are currently searching Stornoway.