The incident in the Highlands left one man dead and three injured, Police Scotland said.
John MacKinnon, 47, died after trying to help others as the events unfolded.
A 32-year-old woman and a man and woman, both 63, were taken to hospital following the incidents, some of which involved a gun.
Chief Superintendent Conrad Trickett said a Taser was discharged during the course of the incidents.
He said there was a licence for the gun used in the incidents and it was owned by the person who discharged it.
Speaking at a media briefing on Thursday, Mr Trickett said: “The thoughts of myself and colleagues across Police Scotland are very much with the family and friends of Mr MacKinnon and the three people who remain injured.
“These incidents took place in a close-knit rural area and have a significant impact not only on those directly affected but also friends and their neighbours living in these communities.
“Serious incidents witnessed yesterday are extremely rare and I would like to further reassure the local communities that they were dealt with and there is no further threat.”
Asked if there would be additional firearms checks in the area, he said: “There is a vigorous process around firearms licensing that involves both local officers, the divisional firearms licensing team, who are specialists in the area, and national firearms licensing.
“All licences are reviewed as per the legislation and that will continue in an ongoing way.”
Forensics teams assessing the scene
John Linton
John MacKinnon died in the incidents
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