A search is under way off the coast of Donegal for a missing diver.

The Coast Guard Rescue 118 helicopter based in Strandhill, Sligo, and the Lough Swilly RNLI lifeboat are involved in the operation about 27km north of Fanad.

A number of local boats are also understood to be involved in the search.

The diver is believed to be one of a number who were diving in wrecks in the area and was reported missing to Malin Head Coast Guard this afternoon.