A serious collision involving a lorry and a minibus in Berkshire has left two people dead, while a third has life-threatening injuries.
Thames Valley Police say the incident happened at 12.20pm on the M4 on Thursday between junction 14 at Hungerford and junction 13 at Chieveley.
Both sides of the motorway were closed, allowing air ambulances to land at the scene.
The stretch of motorway eastbound is set to remain closed for many hours with traffic being turned around but it has been re-opened westbound.
Those stuck in the congestion near the scene of the crash have been told to stay in their vehicles.
“We received multiple emergency 999 calls just after 12.15 this afternoon reporting a serious collision between a lorry and a minibus on the M4 eastbound between junctions 14 and 13," a South Central Ambulance Service spokesman said.
"We sent three air ambulances (Thames Valley, Hampshire & Isle of Wight, Great Western) to the scene, along with the Hampshire & Isle of Wight critical care car, six ambulances, a bronze ambulance officer in a rapid response vehicle and a silver officer/incident commander in a rapid response vehicle.
"Three people in the minibus had sustained life-threatening injuries; one was flown to the major trauma centre at the John Radcliffe Hospital, Oxford, one went by road to the major trauma centre at the John Radcliffe Hospital, and the third was flown to the major trauma centre at Bristol Southmead Hospital.
"Three further people in the minibus had sustained less serious injuries, two of whom were taken by road to the Great Western Hospital, Swindon, and the third to the Royal Berkshire Hospital, Reading.”