Police in Britain have condemned the shooting down of an officer during a routine check of a stolen vehicle as an "appalling, dreadful attack".
The officer and his colleague were shot as they were making an arrest in Leeds after they noticed a car was strangely parked.
The driver of the car was taken to the police car and placed in the back seat.
As one officer opened the back door to handcuff the suspect he produced a hand gun and shot each policeman several times, fatally wounding the officer in the front seat.
The shootings took place around 15 minutes after the vehicle was first spotted.
Speaking at a press conference at Killingbeck Police Station, Detective Superintendent Chris Gregg said: "This was an attack on two unarmed officers which can only be described as an appalling, dreadful, attack."
The dead officer's wife is "absolutely distraught, deeply distressed and in a state of disbelief", he said.
After the shootings, the gunman threatened a passer-by, and a struggle ensued.
He then fired randomly into the street and stopped two people passing in a car and stole the vehicle.
The gunman was described as white, in his 30s to 40s, with a stocky build and a tanned or olive complexion.
The second police officer, who is in his 40s, was said to be in a stable and non-life-threatening condition in hospital.
PA