SAO PAULO (Reuters) - Brazilian investigators believe 6.19 billion reais ($2.1 bln) in bribes were moved in a corruption scheme involving state-run oil firm Petroleo Brasileiro SA , prosecutor Deltan Dallagnol said on Thursday.
Prosecutors are seeking to restore 6.77 billion reais to public coffers through fines and the return of stolen funds, he said at a press conference to announce criminal charges against four former congressmen.
(Reporting by Caroline Stauffer; Editing by Chris Reese)