BBC.The offices of German luxury carmaker Porsche have been raided by federal prosecutors probing the alleged market manipulation of Volkswagen shares.
Porsche had built up a stake of 51% in VW in an attempt to launch a takeover of Europe's biggest carmaker.
The two have subsequently agreed to a merger, ending months of bitter feuding, which will take place in 2011.
The carmaker denied the accusations and said that it would co-operate fully with the prosecutors.