A 13-year-old boy has been arrested after a teenager was left in a life-threatening condition following a stabbing.
Greater Manchester Police said the 15-year-old boy was found with stab wounds on Worsley Avenue in Moston at 7.10pm on Tuesday.
The youngster was arrested on suspicion of section 18 wounding.
Inspector Matt Oxley said: "This was a horrific attack on a young boy who is now fighting for his life. My thoughts are with him and his family.
"Our investigation is in its very early stages so we are appealing for anyone who knows what happened to get in touch.
"We have made an arrest, however we are still trying to piece together the puzzle and would appreciate the public's help."
Anyone with any information should contact police on 101, quoting the reference number 1969 of the 17 October 2017, or call Crimestoppers anonymously on 0800 555 111.