A teenage girl has lost her unborn baby after a collision with a police car travelling in the wrong direction on a dual carriageway.
Stacey Ellington, 16, from Wisbech, Cambs, and her boyfriend, Dave Loasby, 17, were seriously injured in the collision on the A47 on Friday night.
Police were pursuing a car at Terrington St John, Norfolk, after its description had been given to patrols.
It had sped away from a petrol station forecourt and was being pursued.
The Cavalier that was being followed swerved to avoid a Peugeot driven by Mr Loasby in the right direction. The police car was then in collision with the Peugeot.
Miss Ellington, who was six months pregnant, was taken to the Queen Elizabeth Hospital in King's Lynn for treatment but doctors were unable to save her baby.
Failed to stop
She is described as "critically ill" by the hospital. Mr Loasby was also taken to hospital with serious injuries but later released.
The police officers were treated for minor injuries.
A Norfolk Police spokesman said the Cavalier failed to stop following the crash and was later found burnt out in a field near Emneth Hungate, Norfolk.
The spokesman said that the matter had been passed to the Independent Police Complaints Commission as was standard procedure whenever a police vehicle was involved in a collision.
A Norfolk Police statement said: "This is a tragic incident and we regret an innocent person is currently being treated for serious injuries."
Both police officers involved in the incident are recovering at home and have been allocated non-driving duties pending the outcome of the investigation.