Société Générale is suffering more repercussions from its acquisition of Russian bank Rosbank, with a Swiss investor attacking its alleged role in losses from investing in a construction project that was said to be backed by Vladimir Putin’s government. Swiss businessman Gerhard Ammann, 78, invested in projects controlled by Vincent Petrillo, who claimed to be chief executive of ZAO Soyuzneftegaz-Invest (SNG Invest), a company partially owned by Russian state-owned enterprises.