Three men have died after four people fell into a slurry tank on a farm at Hillsborough, County Down.
Those who died are believed to be two brothers and their father.
Their sister has been taken to the Royal Victoria Hospital in Belfast where she is recovering from the effects of fume inhalation.
Ambulance crews received a call to the farm in Drumlough Road just after 18:00 BST and deployed rapid response teams to the scene.
In a statement, the Northern Ireland Ambulance Service (NIAS) said the Northern Ireland Fire and Rescue service pulled four people from the slurry pit, three of whom were unconscious.
NIAS paramedics tried to resuscitate the three men but two died at the scene.
The third man initally responded to resuscitation and was taken to the nearby Lagan Valley Hospital in Lisburn, where he died a short time later.