Victoria has recorded 238 new coronavirus cases on Wednesday, as the state nears 2000 active cases.
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Of the new cases, 209 are under investigation by the state's public health team, with 29 related to known outbreaks.
In the past 24 hours, three people have died from COVID-19.
There are 105 Victorians in hospital for COVID-19, with 27 of those in intensive care.
Premier Daniel Andrews said the vast majority of Victorians were doing the right thing.
"If people don't do the right thing, then we will have to move to additional restrictions being put in place and potentially prolong the period where restrictions are in place," he said.
Chief health officer Brett Sutton said the number of new cases noted in the past few days had stabilised.
"It is still a significant number but the stabilisation might be the beginning of the restrictions in place," he said.
When asked whether or not the existing six week lockdown or an extension of the lockdown would be extended to regional Victoria, Mr Sutton said it was "in everyone's hands".
"I don't know how likely it is to step up [restrictions]," he said.
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Victoria Police Deputy Commissioner Rick Nugent said officers were manning eight checkpoints on the regional Victoria and metropolitan Melbourne interface.
"We have checked 85,000 vehicles at these checkpoints, with the majority of people complying," Mr Nugent said.
"We have issued 151 infringement notices to people not complying.
"The most common reasons are to visit family, friends or associates and overnight stays, which are clearly not permitted under the chief health officer's directions."
In the past 24 hours, 63 people have been fined, with 21 of those at vehicle checkpoints.
Since stage three restrictions came into effect across metropolitan Melbourne and Mitchell Shire on Thursday last week, 546 infringement notices have been issued.
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