Emergency services were called to Dalkey in south Co Dublin late on Sunday night after a person suffered a fall at a disused quarry.
The incident took place about 11pm and units of the National Ambulance Service, the Garda and the Coast Guard Helicopter attended the scene.
A spokesman for the Coast Guard confirmed the Coast Guard Helicopter was dispatched to the quarry. However he said person who fell had not received life threatening injuries and the helicopter was stood down. The spokesman said as the operation was ongoing no further information would be available.
The former quarry is a well known location for climbers.
