Victoria Police is set to gain extraordinary powers to tackle terrorism and gun crime, with laws allowing officers to search suspects without a warrant.

The Chief Commissioner, at his discretion, will be able to impose an order on a person that means they, as well as their cars and property, can be searched at any time.

Guns seized in an international operation that ended in Melbourne last year. Credit:Penny Stephens

Known as firearm prohibition orders, the conditions could be placed on someone as young as 14 if the Chief Commissioner believes it is in the public interest. An order can be granted even if the suspect does not a have a prior conviction.

The types of people who might qualify include those exhibiting radicalised behaviour, as well as bikies, organised crime figures and young gang members, Deputy Commissioner Shane Patton said.