The forced closure of schools and businesses will present opportunities for burglars, with police urging business owners to take steps to protect themselves.
North East Detective Senior Sergeant Garry Barton said there hadn't been a spike in break-ins.
But he said police were keeping a close watch on known offenders and increasing patrols.
"In these unusual times, it's going to take a team effort," he said.
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"We ask schools and businesses that are closed not to make it easy for offenders.
"They shouldn't leave cash on premises and should lock up valuable assets."
Items most at risk are cash, computers, guns, chainsaws and generators, Detective Senior Sergeant Barton said.
Food could also be targeted at cafes and restaurants.
"Alcohol and cigarettes can be potential commodities offenders might look at," he said.
"We want people to keep a look out for their neighbours and other business owners and share ideas.
"Don't hesitate to call police if you have concerns or information."
Meanwhile police say people required to self-isolate are not doing so, and have been found to be going to the cinemas and eateries.
Victoria Police Deputy Commissioner Rick Nugent said police were conducting spot checks on those required to isolate.
"Unfortunately there are people who are not taking these restrictions seriously," he said.
"What we have found in doing these spot checks is that people are admitting that they are actually not staying at home and quarantining themselves.
"They've been visiting the movies, going out for breakfast or other meals, and this is putting too many people at risk.
"People who ignore the restrictions are placing others at significant risk of catching the virus, and people will become infected.
This includes their own family, their friends and other people within the community. It's actually quite selfish."
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