Twenty-nine people were injured in a bus crash near the Clyde Tunnel.

The First Bus is understood to have struck a barrier on the Clyde Expressway, mounted an embankment and overturned shortly after 7pm on Sunday.

Seventeen people remain in hospital and three - including the driver - are in a serious but stable condition.

One passenger initially described as critically injured is no longer in a life-threatening condition.

The Clyde Expressway was closed northbound for about nine hours after the crash and reopened at 5.15am.

Inspector Darren Faulds, who is leading the investigation into the collision, said: "After officers arrived at the scene, they spoke to 28 passengers and the driver of the bus.

"Our investigation is continuing today into the cause of the crash.

"The bus involved will be fully examined and officers are gathering and studying CCTV footage from the area to assist with their enquiry.

"At this time, I would urge anyone who may have been on the bus and left prior to arrival of the emergency services, or anyone who witnessed the crash take place to contact police."

First Bus confirmed a joint investigation between the police and the Driver and Vehicle Standards Agency (DVSA) is now underway to establish the cause of the accident.

Andrew Jarvis, Managing Director for First Glasgow, wished everyone involved a speedy recovery.

He added: "The vehicle has now been recovered from the crash site and is under the control of Police Scotland pending investigation and we will continue to assist the authorities with any information and help they require regarding the incident.

"I would again like to pay tribute to the emergency services for their handling of this incident and the swift response.

"We had two members of staff on board, the driver and an off-duty driver making his way home."

Mr Jarvis confirmed both sustained broken bones, cuts and bruises.

He also said the driver of the bus is in a a serious, but stable condition.

A dedicated hotline to provide support, guidance and advice has been set up on 0117 440 3944.