A pilot and a seven-year-old boy were killed when their light aircraft crashed down into bogland after a parachute jump, The Sun reported.
Witnesses recalled seeing the plane coming down "like a torpedo" just after skydivers had made their jump.
The plane was carrying 16 parachutists from the Irish Parachute Club who had jumped from the light aircraft before the horror plunge.
However, the pilot and the youngster were on board when the aircraft smashed into a bog shortly afterwards.
The horror unfolded just after 2pm on Sunday in an area between Edenderry and Daingean in Co Offaly, Ireland.
Investigators had trouble getting to the scene because of the terrain and it took several hours before they reached the plane, a Cessna 208B Grand Caravan.
It is understood the victims were a visiting pilot from England and the boy was the son of one of the members of the Irish Parachute Club.
The father, who is originally from Poland, but lives in Dublin, was among the group of 16 who jumped prior to the crash.
He attended the crash scene later.
The Air Accident Investigation Unit set up a cordon around the area and digging machinery was needed to remove the aircraft from the bog, as the force of the impact had driven the plane into the ground.
Members of the Civil Defence, Offaly Fire Services and Gardai were involved in the operation to access the plane.
Gardai set up a road block not far from the crash site and a number of people from the surrounding areas attended the scene.