A man was found covered in blood in Portadown late on Saturday night.
Detectives are appealing for information and witnesses after an injured man was found in the Ormonde Street area of the town shortly before midnight.
Detective Sergeant Stewart said: “It was reported just after 11.35pm that a man had been stabbed to the chest.
“Officers attended alongside colleagues from Northern Ireland Ambulance Service and, thankfully, it was established that this was incorrect; however a man aged in his 30s had received facial injuries which had caused substantial blood loss.
“Our enquiries are continuing but at this stage we believe that an altercation had occurred between a number of men, and the victim was assaulted with a weapon. The injuries received are not, at this time, believed to be life-threatening.
“We are appealing to anyone who has any information to get in touch. We would particularly ask that anyone who may have been driving in the area at the time and has dashcam footage, or anyone with relevant mobile phone or CCTV recordings, contact us on 101, quoting reference number 1861 of 17/12/23.”
Alternatively, you can submit a report online using the non-emergency reporting form via http://www.psni.police.uk/makeareport/.
You can also contact Crimestoppers anonymously on 0800 555 111.