FRANKFURT (Reuters) - Prosecutors and tax authorities on Tuesday raided the offices of several senior officials of Volkswagen , the German car-maker said.

Investigators searched the offices of supervisory board chairman Hans Dieter Poetsch, finance chief Frank Witter, and human resources head Karlheinz Blessing, a Volkswagen spokesman said.

Neither the works council nor the prosecutor in Braunschweig were immediately available for comment.

(Reporting by Ilona Wissenbach; Writing by Tom Sims; Editing by Angus MacSwan)