The Duke of Edinburgh has been involved in a car crash while driving near the Queen's Sandringham estate, Buckingham Palace has said.

Prince Philip, 97, was not injured in the accident, which happened as he drove a Land Rover out of a driveway onto the A149 shortly before 15:00 GMT.

The other car involved was a Kia. Two women in it needed hospital treatment - they have since been discharged.

Eyewitnesses said the duke's Land Rover overturned during the collision.

They said they helped the duke out of the vehicle. He was conscious but very, very shocked and shaken, they added.

Norfolk police said it was force policy to breath test drivers involved in collisions and both had provided negative readings.

The duke is back at Sandringham and has seen a doctor as a precaution.

A woman who drove past the crash scene - near a village called Babingley - at around 15:40 said she saw an ambulance and "a heavy police presence".

"I was just going down the A149 … and saw a lot of blue flashing lights ahead," she said. "I saw a black, 4x4 type car on its side and me and my son were like 'oh my word, that doesn't look good'.

"Luckily it was just sort of on the side of the road, the road wasn't closed in any way.

"Obviously it looked quite smashed in. I'm quite amazed he [the duke] is okay actually."

Norfolk police confirmed officers were called to the scene shortly before 3pm after a Land Rover and a Kia were involved in a collision.

It had previously been reported the duke had been driving a Range Rover.

The driver of the Kia suffered cuts, while the passenger sustained an arm injury, police said. Both were treated at the Queen Elizabeth Hospital in King's Lynn.

A statement said the road remained open and both vehicles were recovered a short time later.

Nick Cobb, a long-time Babingley resident, was driving past with his 16-year-old daughter Emily at about 15:10 GMT when they spotted an overturned car about 100 yards from their house.

"The [Land Rover] was on its side on a private road.

"The other car was well into the hedge on the opposite side of the road.

"There was lots of debris in the road, lots of glass and lots of other cars, some police cars, some from the Sandringham Estate and about six ordinary looking cars that looked as though they had stopped to help.

"We only found out that it was the duke's car when we saw it on the news. The road was not blocked by the crash and was open when we came past." (BBC)

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