A search is continuing off the Co Donegal coast for a diver missing since yesterday afternoon.

A coastguard rescue helicopter and the Lough Swilly RNLI lifeboat are involved in the operation north of Fanad.

Local boats are also understood to be involved in the search.

It is understood a group of divers set out from Downings pier on a charter boat yesterday morning.

They were diving at a depth of 65m at the site of the Pinto wreck - one of a number of sunken ships from the WWII era off Malin Head.

Lough Swilly lifeboat got a call shortly after 4pm yesterday afternoon to assist in a search operation after one of the divers got into difficulty 16 miles north of Malin Head.

Lough Swilly RNLI spokesperson Joe Joyce said they believe the divers were technical divers, who are permitted to exceed the normal recreational limits imposed on depth and immersion time and which involves accelerated decompression during a dive.

The Lough Swilly lifeboat resumed its search at 6am this morning.

The Portrush Lifeboat is also involved in the search along with Rescue helicopter R118.

The search is being coordinated by Malin Head Coast Guard Centre.