A driver has died after a car careered off the M9 and smashed into a tree.

The crash happened at Cambusbarron, Stirling, at 10.30pm on Wednesday.

A 28-year-old woman was taken to the Queen Elizabeth University Hospital in Glasgow but was pronounced dead on Thursday morning.

Officers said a lorry driver phoned the police after spotting the silver Ford Fiesta in the distance.

The northbound carriageway was closed until 6am while investigations were carried out.

Sergeant David Marr said: "Our thoughts are with the woman's family at this very sad time.

"I cannot commend enough the HGV driver who saw a light from the vehicle and pulled over to investigate this further, before calling emergency services.

"I also want to thank the two other people who stopped to provide assistance.

"As part of our ongoing enquiries into this collision, I'd urge anyone who may have seen the vehicle travelling in the area between 10pm and 10.30pm to contact us as soon as possible.

"Those who have any other information which could be relevant, or who were travelling on the M9 around this time and have dash-cam footage, are also asked to get in touch."