16 people had just jumped out of the single engine Cessna plane during a scheduled parachute jump when it plunged into a wooded area of bogland.
It is understood the pilot - reported to be from the United Kingdom - and a seven-year-old boy were still onboard.
The bodies were recovered from the wreckage in isolated bogland in Co Offaly just before darkness fell about 10pm last night.
A Garda spokesman said: "All 16 parachutists made their jump from the craft".
Eyewitness Jimmy Slattery was out walking his dog when he saw the crash occur on Sunday.
Eddie Fitzpatrick, a councillor, said that the pilot was from the United Kingdom and had been hired by the Irish Parachute Club because their own plane was being serviced. The crash happened a few miles away in bog land near Edenderry.
Postmortems were carried out on the man's remains and those of Kacper Kacprzak at the Midland Regional Hospital, Tullamore today.
"I've seen them thousands of times", he said.
It is noted that the flight took place on the territory of the parachute club, the causes of the crash are being investigated.
The crashed plane had been partially submerged in water and was embedded in the ground after crashing at speed, leading to an exhaustive recovery mission.
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"It's a great shock to hear of an accident like that happening".
Chairman of Offaly County Council, Liam Quinn, says it's a tragedy for all involved adding "that people are particularly, sad it's a very sad day, the fact that there's a young boy involved makes it all the worse".