A major search is under way for a diver missing in the Pentland Firth.

Emergency services were called at 5.20pm on Wednesday after the diver failed to return to a boat off the coast of Burwick in Orkney.

Coastguard rescue teams from Hoy and St Margarets Hope are searching the area along with RNLI lifeboats from Longhope, Thurso and Stromness.

A rescue helicopter from Shetland is also on scene as well as four commercial vessels who are assisting with the operation.

The search is being coordinated by the coastguard.