Firearms have been located by police at an address in Chirnside Park.
Police from Healesville and Lilydale attended at the address in Mayfair Court, Chirnside Park in relation to an ongoing investigation on Monday 2 May.
A search of the premises was conducted under the Family Violence Protection Act and police officers located three homemade handguns and a longarm firearm.
A 31-year-old Chirnside Park man has been arrested and is currently assisting police with their inquiries.