The Auckland businessman suing Whale Oil blogger Cameron Slater reportedly required hospital treatment after a fight on Saturday.
Matthew Blomfield, a former Hell Pizza franchisee who is suing Slater over 2012 blog posts, was taken to hospital with facial injuries on Saturday night, the National Business Review reported.
Police confirmed they attended a report of two men fighting at a Greenhithe address on Saturday night and that a gunshot had been heard.
There is no suggestion Slater was connected to the incident.
"Armed police arrived on the scene and found a 38-year-old man with facial injuries. The offender had fled. He remains outstanding and unidentified."
Police said the man was taken to hospital for treatment, but was later discharged.
"A scene examination and an area canvass have both been conducted. Inquiries are ongoing and Victim Support are assisting the man and his family," police said.
Blomfield could not be contacted for comment.
Blomfield and Slater will return to court in June to continue the appeal into whether Slater can be considered part of the media.
The appeal was adjourned last month in the High Court in Auckland with Justice Raynor Asher saying the issue was "quite important". It would require an interpretation of an aspect of Section 68 of the Evidence Act for the first time.
Section 68 deals with protection of journalists' sources.
Slater has tried to rely on the section as he defends a defamation suit brought by Blomfield in the District Court.
The District Court said Slater could not rely on the protection and he was ordered to hand over his sources.
Slater won leave to appeal that decision, though the appeal will now not be heard until early June.
- Fairfax Media