The horrifying incident took place on Wednesday afternoon where the 15-year-old girl suffered injuries during what officials called an ‘exercise event.’
Officers police rushed to the scene at the Greenogue Equestrian Centre in Dublin at about 2pm.
Members of the Fire Brigade and the National Ambulance Service were also despatched to the incident.
The girl was taken to Children’s Health Ireland in Crumlin but sadly she later died.
The Health and Safety Authority is expected to carry out an examination of the scene on Thursday.
A garda spokeswoman said: “Dublin Fire Brigade and the National Ambulance Service were in attendance and providing medical assistance to a young female (15 years) who was injured during an exercise event.
“She was removed to Children’s Health Ireland (CHI) at Crumlin where she later passed away.
“The Coroner has been notified of this tragic incident. The Health and Safety Authority have also been notified and will carry out an examination tomorrow, Thursday 17th June, 2021.”
The spokeswoman added that investigations into the incident are ongoing with a file being prepared for the Coroners Court.
The Greenogue Equestrian Centre in the Irish capital is a new centre and livery yard that has 55 stables in an American style barn among other facilities.
It is the new home of Horse Sport Ireland after plans were announced in December to move the group’s headquarters to a newly designed administrative HQ and equestrian campus at the site.