Police say the driver of the minibus lost control following a suspected blown tyre. The minibus, which had been travelling in the fast lane, crossed the carriageway and left the road where it overturned, throwing at least two passengers from the vehicle in the process.
The northbound carriageway was initially closed to allow Helimed access to the scene. However air ambulances landed in a nearby field where the three seriously injured people were collected and flown to Southampton General Hospital where they remain in a life-threatening condition.
Seven other people – including two children – were walking wounded. They have been taken to Southampton General Hospital to be examined.
More top news
Robert Weighton and Alfred Smith only became pen pals two years ago - and today Britain's oldest men both celebrated their 109th birthdays.
Simon's Blog - First Thing In The Morning....
Wednesday night's weather for the west of the region