Consultant Nicole McKee said the latest shooting highlighted the need for the utmost care when handling firearms.
"A firearm is a lethal tool that deserves respect. If you become complacent you could become a statistic," she said.
It was the gun user's responsibility to apply the seven basic rules of firearm safety every time they handled a gun, she said.
Police Inspector Tony Wakelin said police were still investigating the circumstances of the Otara shooting, but said the shooting may have been an accident.
Only one person was being spoken to in connection with the incident and police were not looking for anyone else, he said.
Mr Wakelin said the incident once again highlighted the need for people to be careful around firearms.
"At this point and time, it's too early to say exactly what's happened. But initial indications are that it may have been an accidental shooting," he said.
"Don't play with firearms at all. Every weapon should be treated as loaded and in this case, clearly it was, and someone's been seriously injured with a firearm."