Three teenagers hurt in the Largs Academy bus crash in France are expected to remain in hospital for several more days at least.

The two girls and a boy are the only pupils still being detained for treatment in France following Thursday morning's crash on the A6 near Dijon.

The boy, 14-year-old Mark Nicol, is under sedation in intensive care as surgeons work to reconstruct his crushed left arm, a procedure which could take a week to complete.

Katherine Fish, 15, was killed in the accident, for which the driver, Mark Chisholm, has said he is "deeply sorry".

I definitely did not fall asleep at the wheel

Mark Chisholm

North Ayrshire Council spokesman Gerry O'Brien said: "The last three pupils are still in France and I am told it is unlikely they will be returning today."

Mr Chisholm is being formally investigated by the French authorities on charges of manslaughter, involuntary injury and careless driving.

Once discharged from hospital, he will be free to leave the country while further inquiries are carried out.

Mr Chisholm, 31, from Edinburgh, said: "I have a teenage daughter of my own and I cannot imagine what the parents of the girl who died are going through.

England crash

"I definitely did not fall asleep at the wheel. I told the doctors and the police that as soon as I was able to talk to them."

It emerged on Saturday that Mr Chisholm may have been involved in another school bus crash last month.

Northumbria Police said a 31-year-old man was questioned after a coach collided with a lorry on the A1 near Belford, Northumberland, on 31 May.

The driver was not named but is understood to have been Mr Chisholm.

Medical escort

Six children and teachers involved in the crash flew home on Saturday night.

The two schoolgirls and four teachers, two men and two women, were met at Glasgow Airport by a medical team that escorted them to hospital for further theatment.

The group included English teacher David McLuskey, who lost an arm in the crash.