The people killed in a plane crash in Connemara were from Counties Dublin and Galway.
A helicopter surveys the crash scene
The pilot was Matt Masterson from south County Dublin while a second victim has been named locally as Paul McNamee from Loughrea, County Galway.
It is understood an eight-seater single engine plane missed the runway at Aerphort na Minna on Thursday.
Three of seven other passengers critically injured are being treated at University College Hospital in Galway.
A rescue worker examines the wreck. Picture courtesy of RTE
It is understood the group were businessmen on their way back after a trial flight to the Aran islands on Thursday. An investigation is under way.
It is thought three people had to be cut from the wreckage.
The scene of the crash is about 25 miles west of Galway city.
A coastguard spokeswoman said the small aircraft, a Cessna 208D, was making a return trip from Inishmaan, an island off the Galway coast.
An investigation has begun into why the plane crashed
The flight would have normally taken about seven minutes.
An eyewitness said: "The front of the plane is totally destroyed.
"One wing was sheared off and is lying on top of the plane."
Aerphort na Minna is the main airport for Aer Arann planes, serving the Aran Islands.
The plane is understood to be a charter plane and not one of the Aer Arann fleet.