The driver of a bus which crashed into a tram near Edinburgh Airport, causing it to derail, is fighting for his life in hospital.

Emergency services were called to the scene at 5.30pm on Wednesday after the vehicles collided.

Police have said the 66-year-old driver of the bus, which is used to take passengers to the airport from long-stay car parks, is in a critical condition at Edinburgh Royal Infirmary.

The tram driver and ticket conductor were treated at the scene by paramedics and their injuries are not thought to be serious.

The 20 passengers who were on the tram were uninjured and there were no passengers on the bus.

As well as the tram derailing, the bus was severely damaged in the crash and struck other unoccupied vehicles.

The tram service is operating on a limited route, running between York Place and the Gyle Centre.

Police have appealed for anyone with information on the crash to come forward.

Sergeant Fraser Wood, from the Road Policing Unit in Edinburgh, said: "We are working at this time to establish why this collision occurred and we'd be keen to hear from any members of the public who witnessed what happened.

"If you believe you have any information that can assist with this investigation then please contact police immediately."

A spokesman for Edinburgh Trams said: "The wellbeing of everyone involved in the incident continues to be our number one priority.

"Early indications would suggest that a bus struck the tram causing it to de-rail.

"We are working with the emergency services and our partners to assist the Police investigation and recover the vehicles involved.

"Once the vehicle has been recovered, an assessment of the tram tracks will be carried out by our maintenance teams."