Four people have been taken hospital following a three-vehicle collision in Northampton.
Northamptonshire Police are warning drivers to steer clear of roads near the serious accident involving one van and two cars.
The accident happened at 11.15am this morning (March 13) in Sandy Lane, Duston.
All emergency services were called to the scene, including several fire engines and two air ambulance helicopters.
A Volkswagen Crafter was in collision with a BMW Mini and BMW 5 series.
The driver of the BMW 5 series, a 70-year-old man, was taken by air ambulance to Coventry and Walsgrave Hospital with life-threatening injuries.
The BMW's passenger, a 41-year-old man, was also taken to Coventry and Walsgrave Hospital by ambulance.
The Mini driver, an 83-year-old man, suffered a chest injury while the driver of the VW Crafter, a 41-year-old man, received a leg injury. Both were taken by ambulance to Northampton General Hospital.
Roads around the incident have now reopened following closures in Sandy Lane and Port Road, Duston, earlier today.
A spokeswoman for East Midlands Ambulance Service (EMAS) said: "Police alerted us to a serious road traffic collision on the junction of Sandy Lane and Harlestone Road in Northampton. The collision involved multiple cars and police reported several patients.
"Due to the number of vehicles involved, and therefore potential patients, we sent three crews and two air ambulances to the scene. Our paramedics assessed all patients and four required urgent hospital treatment.
"The most serious patient was flown by MAGPAS (air ambulance charity) to Coventry and Walsgrave Hospital and a second patient was taken in by paramedics. A further two patients were taken to Northampton General Hospital by an ambulance crew."
A spokeswoman from Warwickshire & Northamptonshire Air Ambulance said: "A man in his sixties, who had suffered injuries to his legs, chest and head was flown to hospital by MAGPAS, while the rest were dealt with by EMAS.
"The current condition of the patients is unknown."
Anyone with information or who witnessed this incident is asked to call the ‘Drivewatch Hotline’ on 0800 174615.