Five teenagers have been arrested by detectives investigating what they are calling a "vicious assault" on an off duty police officer who was left with broken bones.
Officers from Greater Manchester Police executed warrants at four addresses in Westhoughton, Bolton on Friday.
It followed an incident in which police say the off-duty constable was "brutally attacked" after identifying himself as a police officer in a situation where he was trying to help another person.
He suffered with injuries to his face and ribs as well as a broken arm.
Detectives have arrested an 18 year old man and four teenagers aged between 15 and 17. They have since bailed pending further investigation.
"Our officers are committed to protecting the public and keeping our streets safe and absolutely do not deserve to be treated in this way. I would like to reassure the public that we are continuing to treat this incident seriously and are doing all we can to trace every single one of the offenders involved."
Police say their investigation is ongoing and are appealing for information.
Anyone with information should contact police on 0161 856 5757, quoting incident number 3163 of 13/06/2020.
Reports can also be made anonymously to the independent Charity Crimestoppers on 0800 555 111.