A West Midlands police officer died after being involved in a road accident during an operation in Doncaster.
PC Ryan Hunt, 31, was working on a joint operation with South Yorkshire Police.
He was involved in a collision in the Hyde Park area of Doncaster last Friday and died a short time later at Doncaster Royal Infirmary, a spokeswoman for West Midlands Police said.
A 36-year-old Doncaster man was arrested on suspicion of causing death by dangerous driving.
He has been released on police bail pending further inquiries.
An inquest was opened and adjourned at Doncaster Coroner's Court.
No further details about his death will be released as the investigation PC Hunt was working on has not yet been concluded, the spokeswoman added.
The chief constable of South Yorkshire Police, Meredydd Hughes, said: "Ryan's death is a tragedy. He had become not only a valued colleague but also a friend to members of South Yorkshire Police and I wish to convey our sympathy to his family and all those affected by his death."
The chief constable of West Midlands Police, Paul Scott-Lee, said: "I wish to send my condolences to Ryan's family, friends and colleagues.
"He was a committed, dedicated officer who made a valuable contribution to policing within the West Midlands and will be sadly missed."