A man has died after a car collided with a taxi shortly after it was driven off from being ordered to stop by police.
The collision was between Vauxhall Astra containing four men in their 20s and a Skoda Superb taxi at the junction of Burley Street and Burley Road in Leeds at 12.40am.
It left one of the men in the Astra dead and another in the vehicle critically injured.
The taxi driver also had what West Yorkshire Police said were "life-threatening injuries" at Leeds General Infirmary.
A third man in the Astra was less badly hurt while a the fourth was arrested at the scene on a warrant for unconnected matters.
The matter has been referred to the Independent Police Complaints Commission.
A West Yorkshire Police spokesman said: "The collision occurred shortly after the Astra had made off from police officers after being ordered to stop.
"The matter has been referred to the IPCC who have attended the scene.
"If anyone has witnessed the incident please contact the Major Collision Enquiry Team on 101."