A police officer is recovering after he was attacked in the street and knocked unconscious when he approached a gang of youths.
The Pc was on patrol in Preston, Lancashire, when he approached a group of around 10 youths and was struck from behind and knocked to the ground, his force said.
The assault happened at around 8pm on Saturday in the Duke Street and Albyn Bank Road area of Avenham.
His colleagues were alerted by a member of the public and the officer was taken to the Royal Preston Hospital where he later regained consciousness and was treated for cuts and bruises to his face.
He is now recovering at home, the force said.
Seven males aged between 14 and 32, all from the Preston area, were arrested on suspicion of wounding and remain in custody.
Detective Chief Inspector Ian Dawson from Lancashire Police said: "This was a disgraceful incident against a highly respected police officer who was simply doing his job and trying to keep the community safe. Our investigation is still ongoing and a number of other people are actively being sought.
"I would urge anybody who was in the Avenham area around 8pm (on Saturday night) who thinks they may have witnessed this assault or with any information that could assist with our investigation to come forward.
"Fortunately incidents of this nature are rare but they will not be tolerated and we need the public's help to bring those responsible to justice."
Anyone with information should call Lancashire Police on 101 or Crimestoppers on 0800 555 111.