A woman and two men were found to be have sustained stab wounds on Velour Close in Salford on Friday afternoon
One of the men has since had surgery on a life-changing injury. The other man and female have been discharged from hospital.
Police have been following various lines of enquiry and are now turning to the community to see if they are able to assist with the investigation.
Detective Chief Inspector Yanica Weir said: “This appears to be an isolated, targeted and unprovoked attack, in which three men in masks and balaclavas were seen leaving the address on Velour Close following the attack.
“We are carrying out house-to-house enquiries and doing a CCTV trawl from the area, and we are now looking for anyone who was in the area at the time of the incident, to come forward.
“If anyone has any CCTV, mobile or dashcam footage in or around Velour Close on Friday 18 August, to please let us know.
