A “major incident” has been declared after a crash involving a 52-seater bus.
Fire crews are currently working to extract a driver who is “severely trapped” after the crash on the Cleddau Bridge in Pembrokeshire, West Wales, which also involved a car.
Many of the bus passengers are suffering with various injuries, according to the local fire service.
Mid and West Wales Fire and Rescue Service said they were called to the incident at 2.19pm.
Five fire crews were in attendance – from Pembroke Dock, Milford Haven, Haverfordwest, Tenby and Narberth.
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The incident is ongoing and emergency services say more information will be released when available.
A Welsh Ambulance Service spokesperson said: “We were called at approximately 2.14pm, to reports of a road traffic collision on the A477.
“We sent five emergency ambulances, one duty operations manager, one Cymru High Acuity Response Unit and non-emergency patient transport service vehicles to the scene.
“We were supported by colleagues from the Wales Air Ambulance.”