A Coastguard helicopter has gone missing off the west coast with four crew members on board.
Contact was lost around 1am on Tuesday.
A spokesperson said “The Coast Guard can confirm that there has been an incident involving one of our Search and Rescue (SAR) Helicopters off the west coast of Ireland.
At approximately 1am contact was lost with one of our SAR Helicopters. A major sea search is ongoing off the county Mayo coast approximately six miles west of Blacksod. SAR Helicopters from Sligo and Shannon are on scene along with the Air Corps Casa. Ballyglass and Achill all weather lifeboats (ALBs) are on scene along with five local fishing vessels.
The Sligo based Coast Guard helicopter R118 completed an early morning medical evacuation (medevac) of a crewman requiring urgent medical attention from a UK registered fishing vessel approximately 150 miles west of Eagle Island in County Mayo. Owing to the distance involved safety and communication support, known as Top Cover, was provided by the second Coast Guard helicopter, the Dublin based R116.
The search operation is being coordinated by the Coast Guard Rescue Coordination Centre in Malin Head. Both helicopters refuelled at Blacksod prior to transiting to the scene.”