"The victim's family have asked for privacy and do not want any further updates on the man's medical condition to be released at this time."
Meanwhile, investigations into the two men had led to their identification, Mr Stewart said.
"Our inquiries have identified the two men who have gang connections. To date they have been extremely reluctant to talk to police about the incident."
The weapon has yet to be recovered.
"With a gang-related incident such as this there is potential for an escalation. However, we would like to reassure the public that Canterbury police officers directly involved in the investigation and other prevention staff are focussing their efforts to prevent further incidents," Mr Stewart said.
Anyone with information about the incident -- including anyone who may have seen the green/blue Subaru station wagon which drove the man to hospital -- is asked to contact police on 03 363 7400 or anonymously contact Crimestoppers on 0800 555 111.