Oct. 24 (Bloomberg) -- North Texas Tollway Authority officials have been interviewed by FBI agents regarding the conduct of current and former board members, according to offering documents for a planned bond sale.

The authority, which operates toll roads in the Dallas area, said investigators may be looking at “possible conflicts of interests pertaining to authority business,” according to the disclosure for the $673.7 million sale of revenue-backed securities during the week of Oct. 30.

The authority has “no reason to believe that it is the target of the investigation or that the investigation will materially adversely affect” its operations or its financial condition, Michael Rey, an authority spokesman, said by e-mail.

--Editors: Ted Bunker, Jerry Hart.

To contact the reporter on this story: Darrell Preston in Dallas at dpreston@bloomberg.net.

To contact the editor responsible for this story: Mark Tannenbaum at mtannen@bloomberg.net