Police are investigating the death of a 15-year-old boy whose body was found in an alleyway.
Officers were called to reports of a body discovered off Ripponden Road in Oldham, Greater Manchester, at 8am, police said.
Chief Superintendent Chris Sykes, from Greater Manchester Police, said there was nothing to suggest any wrong-doing at this stage but police "cannot rule out third party involvement".
He said: "The death of this young man will be a big shock to the community and we have launched an investigation to find out the full circumstances of what happened.
"We are currently treating his death as unexplained. While there is nothing at this stage to suggest any wrong-doing, we cannot rule out any third party involvement, and we await the outcome of a post-mortem due to take place later today.
"We have increased our patrols in the area to offer reassurance to residents and would ask if anyone has any information or concerns that they come and speak to us.
"In particular we are keen to hear from anyone who may have been in the area overnight into the early hours of the morning on Saturday, February 15. If you saw or heard anything suspicious I would urge you to get in touch with police straight away."
Anyone with information should call police or the independent charity Crimestoppers anonymously on 0800 555 111.