Solomon Islands police have raided the offices of the Ports Authority, removing documents and laptops.
It is the latest development after the government first raised concerns in March, saying it was looking to investigate allegations of bribery and financial misuse.
Since then the chief executive Colin Yow has been removed, but last week some of the unions involved with the port demanded his re-instatement.
Ports officials say in the most recent incident police spoke to finance department staff and took a laptop that had been used by Mr Yow.
Our correspondent says it is not clear what they were after.