Apparently, the 97-year-old royal and husband of the Queen "was involved in a road traffic accident with another vehicle this afternoon".
The duke is back at Sandringham and has seen a doctor as a precaution, who confirmed he was not injured.
Prince Philip showed the former US President Barack Obama and his wife, Michelle, the personal touch when he drove them and the Queen to Windsor Castle after the Marine One presidential helicopter landed close to the monarch's Berkshire home during their visit to the United Kingdom in April 2016.
Image: A picture from the scene of the crash shows a vehicle on its side.
Reportedly, the accident occurred as Prince Philip drove a Range Rover out of the driveway at about 3 p.m. Greenwich Mean Time in Great Britain - or 10 a.m. EST - near the village of Babingley.
She also retweeted a message about the Prime Minister's message to Philip, which said: '"The whole country admires your resilience but it's probably time to admit you can't really steer the damn thing any more", wrote the Duke of Edinburgh in reply'.
"Young, predominantly male, drivers are much more likely to crash within six months of passing their test than older drivers within six months of hanging up their keys".
He said that after seeing the crash, on the A149 near Sandringham: "I went to the other auto".
The cars included the 97-year-old royal's Land Rover and a Kia.
That the palace would even notify the media about such an accident was the first inkling that this wasn't a simple fender-bender. Prince Philip has been staying there with her since Christmas. "We can confirm both drivers were breath tested and provided negative readings".
Photos show the Duke's vehicle flipped on its passenger's side - off to the side of the road. Both were treated at the Queen Elizabeth Hospital in King's Lynn and discharged Thursday night, police said.
Philip retired from public life in 2017, although he still occasionally appears alongside his 92-year-old wife at official engagements. Though increasingly out of the range of journalists and photographers-he even skipped the obligatory Christmas church service on December 25-he's kept up his private duties of being in charge of the royal family's private estates. He said: "The freedom it gives older people its so valuable to maintain social and family contacts".