POLICE, fire and ambulance crews responded to a collision on the Cleddau Bridge earlier.
Numerous sirens were heard as the 999 crews were called to the scene.
Three vehicles were involved.
An eyewitness said: "We were queued up on the bridge and three cars were involved. It looked like everyone was out on the side of the road with one paramedic car there.
"As we passed by there was an ambulance and two fire enegines, one of them seemed to be cutting."
The collision has happened towards the Pembroke Dock side.
At least two ambulances, two fire engines and police cars went to the scene.
The bridge was not closed but police directed traffic around the collision.
There were heavy queues building on both sides of the bridge as the emergency services dealt with the collision.
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