A policeman has undergone surgery after being seriously injured in a late-night shooting in Wolverhampton.
A large area has been cordoned off around the shooting scene
The constable was shot twice in the shoulder at close range by a man he was following for acting suspiciously.
The experienced 33-year-old officer is in a serious but stable condition in hospital with family at his bedside.
House-to-house enquiries have been carried out in Oaklands Road and Penn Road in the Graiseley area. A large area around the scene is sealed off.
A West Midlands Police spokesman said the incident happened about 2230 GMT when the officer, who was in plain clothes, followed a man who had aroused suspicion at the Bromford Rise flats.
The constable followed him to Penn Road and identified himself as a police officer before the man produced a weapon, shooting and seriously injuring him.
Police said the offender was believed to be a black man, about 6ft 2in tall with an athletic build and dark coloured clothing.
Assistant Chief Constable Anil Patani said the shooting was being treated as attempted murder.
"This incident demonstrates our officers' commitment to keeping the community safe.
"West Midlands police officers routinely challenge suspicious criminal behaviour and this demonstrates they are incredibly brave in doing so.
"Criminals resort to extreme measures and we will do all we can to protect the community."
Party-goers at the nearby Quality Hotel told how the music was stopped at about 2245 GMT.
Leanne Smith, 20, said: "We all wondered what was going on but eventually some police officers came in and said there had been an incident.
"We found out later a policeman had been shot."
She added that an abandoned silver Ford Focus car was in the middle of the street outside and the area had been sealed off.