LONDON (AP) — A United Airlines flight bound for London has made an emergency landing at Shannon Airport in Ireland after severe turbulence that left 16 passengers needing hospital treatment.

Airport officials said Wednesday 14 passengers and two members of the flight crew were transferred to University Hospital Limerick for treatment.

Officials say United Flight 880 arrived at Shannon Airport early Wednesday morning. The flight originated in Houston and was supposed to land at London's Heathrow Airport.

United says "severe and unexpected turbulence" caused the flight diversion. The extent of injuries wasn't immediately known.