A virus has caused chaos in Victoria's entire speed camera network with all fines for fixed red light and speed cameras on hold until a full investigation is conducted.
On Friday, police said 55 speed and red-light cameras across Victoria were found to have been infected with a cyber virus - but on Saturday the government quarantined the entire system statewide.
"Last evening I was notified that there had been 42 other cameras that had also been infected," Police Minister Lisa Neville told reporters on Saturday.
"At no point could I be confident that this virus had not gone into any other of the 280 cameras."
Ms Neville has ordered an investigation into all fixed red light and speed cameras across the state and no fines will be issued while this takes place.
The cameras were compromised on June 6 when a maintenance worker inadvertently uploaded a ransomware virus onto the network using a USB stick that was being used for a system update.
Despite the investigation, police say there is no evidence to suggest the cameras have malfunctioned.
"I have decided to withdraw all infringements statewide since the sixth of June in fairness to the Victorian community," Assistant Commissioner Doug Fryer said on Saturday.
"That does not mean they won't be reissued, but I need to be absolutely sure that the 280 cameras were working correctly and without any corruption."
Police say once the review of the cameras has been completed, tickets will either be reissued or cancelled depending on the outcome.
Cameras are still in operation during the investigation and any people caught during this time may still have fines issued at a later day, police say.
Victoria's Road Safety Commissioner John Voyage told AAP on Thursday the virus tried to take over the cameras but it was unable to do that because it was unable to connect to the internet.
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