Preliminary inquests into the deaths of two Coast Guard crew members off the Co Mayo coast will be held next month.

It is expected that the proceedings will commence and be adjourned soon afterwards, given that separate inquiries into the tragedy are ongoing.

Four crew members aboard Rescue 116 died when the helicopter crashed into Blackrock Island on 14 March last.

The bodies of Captain Dara Fitzpatrick and Captain Mark Duffy were recovered afterwards.

Their colleagues, Paul Ormsby and Ciarán Smith, remain lost at sea.

It is understood the North Mayo coroner is hoping to be in a position to issue certificates of death, which will allow the deaths to be formally registered.

A spokesperson for the coroner said that, after initial matters were dealt with, it was planned to adjourn the inquests to a later date.

Separate inquiries into the fatal crash are being conducted by gardaí and the Air Accident Investigation Unit.