On Tuesday, four people were killed when a gunman went on a rampage across the northern Australian city of Darwin.
A man has been charged over the alleged mass shooting in Darwin which left four people dead. The gunman then reportedly fled the scene and later opened fire on passers-by in the city's suburb.
Kershaw said the man was arrested after he contacted a senior police officer.
While NT Health said that two people were being treated at the Royal Darwin Hospital, the number of injured people across multiple locations remained unknown.
Hoffman has been held under guard in a Darwin hospital - where he has undergone surgery for apparent knife wounds "sustained prior" to being Tasered and arrested by police - since late Tuesday night. They said he apparently acted alone and that no other suspects were being sought, the BBC reported.
A possible motive for the deadly shooting was not immediately known but police said in a statement that the incident was not "terror-related".
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The landlord of 52-year-old Kiwi Rob Courtney told 1 NEWS he was a "lovely bloke" who died after trying to stop the attacker.
Police acknowledged they believed the man had acted by myself.
Northern Territory Chief Minister Michael Gunner said officials would conduct an urgent review of all prisoners on parole in the wake of the shootings.
Other witnesses said they heard what sounded like firecrackers, while a woman told the ABC she saw a man with a shotgun and gave first aid to a woman who had been shot in the legs.
"He shot up your complete rooms and he went to each and each room buying for somebody and he shot all of them up, then we noticed him bustle out, soar into his Toyota gain-up, and bustle off", Mr Rose acknowledged.
Over the next hour, the shooter went on to kill 52-year-old casino security guard Rob Courtney at a home in Jolly St, Woolner, a 75-year-old in Gardens Hill Crescent and Michael Sisois, 57, in the auto park of the Buff Club in Stuart Park.
Police cordon off Palms Motel in Darwin after the shooting. "This is now no longer the Darwin we know".