Three rapid response vehicles and five emergency ambulances were sent to the scene, where there were "multiple casualties", a spokeswoman for Welsh Ambulance Services NHS Trust said.
She added the ambulance service was called to the single vehicle collision at about 8.55am this morning.
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Michael Haines said he wanted to continue his brother's legacy so he would be remembered for his good work rather than his death.
Tomorrow should be a bit quieter in most places, with lighter winds and some lovely winter sunshine.
There will be a widespread frost and ice to watch out for tonight, with some bitterly cold temperatures too.