One lane has been closed on the northbound carriageway of the A12 near Ipswich following a collision between a coach and two cars.
The crash happened at 2.15pm just before junction 55 at the Copdock interchange, resulting in congestion leading back two miles to Capel St Mary.
The coach, a Scania, collided with a Kia Sportage and a Fiat Doblo.
Ambulances were called to the incident but the extent of injuries are not yet known.
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