Mr Marshall signalled he hoped to re-introduce restrictions that would allow residents within 40 kilometres of the South Australia-Victoria border some freedom of travel to access property, schools and shops, among other services.

Victorian premier Daniel Andrews was expected to speak to Mr Marshall on Friday afternoon to reach a "common-sense agreement" about restrictions imposed on cross-border communities.

Mr Marshall told media today that while declining case numbers in regional Victoria were promising, it was too soon to talk about easing border control measures.

"When we announced this (hard border) two weeks ago we wanted to give the maximum amount of warning before these harsh restrictions were put in place," he said.

"At that time we saw a widespread seeding of the coronavirus across regional Victoria, this was of concern to us.

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"Since that date, there was an escalation. Recently there's been a stabilisation and a decrease in the number of regional infections. But, we're still concerned, we're still monitoring it.

"I'm hopeful that we will be able to move back to the 40-kilometre buffer zone arrangements very soon.

"I know this would be an enormous benefit to those communities. It would be an enormous relief to those communities if we could go back to that as quickly as possible.

"My commitment is that the entire team here in South Australia is gathering the evidence so that we can do that."

Mr Marshall said he had received detailed data from the Victorian government about coronavirus cases in regional Victoria.

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South Australian Chief Health Officer Nicola Spurrier said her team wanted more detail about the 269 cases in regional Victoria before decisions could be made about the border.

"What I'm interested in knowing more about is how are they linked to clusters? What are the chains of transmission? Are all of the close contacts in quarantine?" she said.

"That's quite detailed information, and I've been reassured that I will be receiving that on a regular basis because only knowing that can we make really well-informed decisions about the border.

"We don't want to keep these very hard restrictions in place any longer then we have to. Many people that live over the border or in border communities feel as much a part of the South Australian community as we do, and we don't want to be penalising them unnecessarily."

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