Belgium's stock market regulator said Tuesday that it has completed a preliminary probe into a statement Fortis NV made last year about its solvency and is launching a full investigation.
In June 2008 Fortis said it was accelerating a solvency plan aimed at raising more than 8 billion euros (about $11.4 billion) in additional capital.
The banking company suffered heavy losses in the credit crisis and was dismantled in October.
The Belgian regulatory agency, the CBFA, said in a statement that its investigations officer will hear testimony from the company and people involved in the matter.
The officer is to submit conclusions to a special committee that will decide whether sanctions are warranted.
The CBFA did not disclose its specific concerns about the Fortis statement.
A spokesman for the regulatory agency could not be reached for comment.