The Victorian opposition has labelled Premier Daniel Andrews “paranoid” after he reportedly ordered ministers to hand in their mobile phones over sensitive information leaked to the media.

Mr Andrews told cabinet MPs auditors KPMG would check their phones to find out who gave 3AW’s Neil Mitchell details about a boost in police numbers days before it was announced, the Herald Sun reported.

Opposition Leader Matthew Guy says the move would be unprecedented, as there has never been a time where a premier or prime minister has searched their own ministers' phones.

"It is the most extraordinary circumstance that a premier distrusts his own ministers to the extent that he wants to search their mobile phones," Mr Guy said.

“There’s never been a circumstances as bizarre or paranoid as this in Australian politics. If he doesn’t trust his own ministers, then why would Victorians trust his own government.”

The move was announced at a cabinet meeting yesterday and then almost immediately leaked to the media.

Treasurer Tim Pallas was also reluctant to comment on the cabinet meeting, except to say he thought the premier was "a great guy".

"I make no comments on what goes on in cabinet and the principals of cabinet solidarity, of course, require that nobody makes comment," he said.

Broadcaster Neil Mitchell said the premier’s move was “juvenile, amateurish [and] dysdunctional”.

The information was reportedly leaked to 3AW broadcaster Neil Mitchell. (9NEWS)

“By all means call them in and lecture them, but a witch hunt… it really is childish,” he said.

Mitchell questioned why there was indeed such drastic action over a leak on a positive news story.