British Airways flight BA295 descended 28,000 feet over Ireland after a "technical issue" forced the aircraft to declare an emergency and return to London Heathrow.
The Boeing jet was en route from London to Chicago's O'Hare airport when the sudden descent triggered deployment of oxygen masks. The Guardian reports the plane landed safely back at Heathrow.
No details were provided about the nature of the technical issue, the number of passengers and crew on board, the duration of the descent, or statements from British Airways or aviation authorities about the incident.