CONSUMER Affairs Victoria has re-opened its investigation into the man dubbed ''Australia's worst landlord'', Frank Cassar. Investigators had taken statements from witnesses and evidence was being assessed, CAV said.

The probe of Mr Cassar's affairs is part of a wider investigation into rogue rooming house operators.

Mr Cassar is also locked in battle with the City of Yarra, which this week seized five unregistered vehicles from outside his Fitzroy home.

Yesterday, two registered vehicles apparently belonging to Mr Cassar were seen on the street. A Yarra spokeswoman said the city could not take any action because it could only seize unregistered cars, and street signs near Mr Cassar's business had been painted white, making it impossible to prove parking restrictions had been broken.