U.S. tech giants Apple, Google and Amazon and French game developer Gameloft are under investigation in Italy for alleged unfair commercial practices, the countrys antitrust and competition authority said. The investigation will determine whether the four companies are misleading customers by advertising mobile game apps as free, when in fact purchases are required to continue playing beyond a certain point, the regulator said in a statement. Moreover, insufficient information seems to be provided to consumers about the settings needed to stop or limit the purchases within the app. Apple declined to comment while Gameloft said it was looking into the issue but had no other comment. Google and Amazon could not immediately be reached for a reaction.