A transatlantic jet diverted to Shannon Airport early on Tuesday morning.
KLM Royal Dutch Airlines flight KL-714 was travelling from Paramaribo in Suriname to Amsterdam in The Netherlands at the time.
Shortly before 3.00am, when the flight was about 300 kilometres south of Ireland, the crew made contact with air traffic controllers to request clearance to divert to Shannon.
The flight crew reported they had a female passenger on board who was showing symptoms of a stroke and asked that emergency medical services be available for their arrival.
The Boeing 777 landed safely at 3.40am and was met on arrival by Shannon Airport Police and Fire Service vehicles. The aircraft taxied to the terminal building where airport authorities and National Ambulance Service paramedics were standing by.
The passenger was removed to University Hospital Limerick for treatment. The flight continued its journey to Amsterdam at around 5.20am.
At around the same time, the crew of a British Airways flight from the Caribbean island of Antigua to Gatwick Airport in England indicated to air traffic controllers in Ireland that they might have to divert with a medical situation on board.
The crew requested weather details and runway in use in Shannon in case they had to divert but in the end, carried onto Gatwick.