Alexandros Avatangelos, one of several suspects in a broadening scandal involving kickbacks for state defense deals, was to face an investigating magistrate on Friday after violating the terms of his conditional release.
The businessman, who is charged with money laundering, had pledged to post 500,000 euros in bail after testifying earlier this month but failed to do so. He was rearrested on Thursday.
Meanwhile Sotiris Emmanouil, the former head of the Skaramangas shipyards, another key suspect believed to have received some 20 million euros in bribes to secure submarine deals, was to defend himself before a magistrate on Friday.
Yiannis Beltsios, another suspect facing the same charges of accepting bribes and money laundering as Emmanouil, is to answer to a magistrate on Saturday.