Police have made three further arrests as they continue to investigate after a body was found in the Leeds and Liverpool Canal near King Street, Leigh.
The man, believed to be in his 30s, was found with multiple injuries.
A scene remains in place and enquiries are ongoing.
A 21-year-old man was arrested on suspicion of murder. He has since been released with no further action.
Three further males, aged 16, 17 and 18, have been arrested on suspicion of murder. They remain in custody for questioning.
A scene remains in place and extensive enquiries are ongoing.
Detective Chief Inspector Liz Hopkinson of GMP’s Major Incident Team, said: “First and foremost our thoughts remain firmly with the family of the man who very tragically lost his life and we currently have specialist officers providing support to them.
“We currently have three people in custody for questioning but I would stress that our investigation is continuing at pace to ensure we are able to provide his family with the answers they deserve.
“We will continue to have an increased police presence in the area and encourage anyone with any worries or concerns to speak with officers. We’re also continuing to appeal to anyone who has any information, or was in the area on Wednesday night or Thursday morning to make contact with police as a matter of urgency. Any information, no matter how big or small, could be crucial to the investigation.”