Almost 100 people have arrived in Victoria from Greater Brisbane on Saturday, despite being told to stay put during that region's lockdown.
"We've taken their details and they're in home quarantine until Monday night," a government spokeswoman said.
The Victorian government said on Saturday evening that 96 people had arrived from Brisbane or other locations deemed hot spots on Saturday.
The arrivals have occurred during a three-day lockdown of the Greater Brisbane region which started on Friday at 6pm and after advice from Victoria's Chief Health Officer telling people to stay put until the lockdown was over.
Victoria's borders closed at 11.59pm Friday to anyone who has been in Brisbane City, Moreton Bay, Redland, Ipswich and Logan on or after Saturday January 2.
This caused a rush out of the state as interstate residents tried to get home.
The government spokeswoman said 50 per cent of Saturday's volume in Victorian virus-testing sites had come from travellers from Queensland.
The lockdown of Brisbane and surrounding areas was prompted by a locally acquired case of the highly infectious UK strain of COVID-19 in a hotel quarantine worker.
It has now been revealed the variant has also been detected in Victoria.
Health minister Martin Foley revealed on Saturday a woman who flew into Melbourne on Boxing Day tested positive for the UK strain.
Ten days later she was deemed no longer infectious and cleared to leave hotel quarantine and travel back to her home state of Queensland via Jetstar on January 5.
Passengers on the same flight have been advised to get tested.
Queensland authorities re-tested her "out of an abundance of caution" and she tested positive, though her infection level is understood to be low.
"She's tested positive but she's not infectious, is the advice from the Queensland chief health officer," Mr Foley said.
"You can continue to shed virus for up to 120 days after you're no longer infectious."
Victorian authorities' release of the woman on day 10 of her quarantine was in line with national protocol at the time, however since the Friday meeting of national cabinet the rules on this have changed.
Those who test positive for the UK strain of the virus will now complete a full 14 days in hotel quarantine, even if symptom-free and no longer infectious.
Victoria now has 40 active cases, including a single new case recorded on Saturday who is in hotel quarantine. Of the 40 cases, 28 have been locally acquired and 12 are in hotel quarantine. The number of cases linked to a Thai restaurant in Black Rock remains at 27.
Saturday was the state's third consecutive day without a locally acquired case.
Victoria's border with NSW remains closed and authorities are working on more than 5,000 exemption applications for travel to Victoria for compassionate and medical reasons.
There have been 781 exemptions granted so far.