A major search is being carried out to find a missing schoolgirl.

Hannah Mackenzie was last seen outside the Nicholson Institute in Stornoway on the Isle of Lewis at 4pm on Thursday.

The 17-year-old is 5ft 5in, slim and has dark hair in a ponytail.

She was last seen wearing a dark blue Nicolson Institute sweater, black skinny jeans and a black jacket with white lining and white furry strip on the hood.

The Hebrides Search and Rescue and HM Coastguard is helping in the search, focusing on the Lews Castle Grounds in Stornoway.

It comes after a potential sighting in the area on Thursday evening.

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."