Its director general, Gilles Alix, and the manager of the international division of its communications subsidiary Havas, Jean-Philippe Dorent, were also taken into custody, a judicial source added. Reacting to news reports of the French probe, the Guinean government said that Bollore's concession to build a container port in the capital Conakry was in strict compliance with the law. "The port concession obtained by Bollore in Guinea was in strict compliance with the laws in force," Damantang Albert Camara told Reuters by telephone. The news that the magnate was being questioned caused Bollore stocks to tumble over 8 percent in Paris trading. Investigators are probing allegations that the tentacular group, which has interests in construction, logistics, media, advertising and shipping, corrupted public officials to clinch the Lome port deal in 2010 as well as the Conakry deal in 2011.