Victoria Police has launched a major operation targeting alleged criminal activity in the state’s construction industry, with the CFMEU’s Melbourne headquarters among several properties searched.

Police carried out warrants at six locations as part of an investigation into alleged corruption and undisclosed financial dealings within the construction sector.

The operation involved specialist investigators from Victoria Police, including organised crime and cybercrime teams.

Authorities seized a range of material during the searches, including electronic devices, vehicles and documents, as investigators work to determine whether criminal activity has taken place.

Five men were arrested during the operation. Two have been charged with separate offences involving drugs and firearm storage, while three others were released as police continue their investigation.

Police have stressed that the broader investigation remains ongoing and is focused on allegations of corruption and other serious criminal conduct connected to the construction industry.

The raid comes at a time of heightened scrutiny of Victoria’s building and construction sector. Concerns over alleged corruption, criminal influence and misconduct have prompted the state government to establish a royal commission into the industry.

The commission is expected to examine a wide range of issues, including the involvement of unions, construction businesses, labour hire companies and government bodies responsible for major infrastructure projects.

Authorities say the parallel investigations are intended to uncover how criminal networks may have operated within the sector and whether existing safeguards were sufficient.

Police have urged anyone with information about suspected criminal activity in the construction industry to come forward.

The latest raids are likely to add further pressure on an industry already facing significant public and political scrutiny, as authorities move to strengthen oversight and tackle alleged corruption.

The investigation remains active, and no conclusions have been reached about any individuals or organisations involved.