As reported by Censor.NET, this was announced by TASS news agency citing Bloomberg.
The investigation has been launched in the European Union. American authorities say the funds in question might have been received through corrupt activities.
The court documents state that the $300 million are kept in bank accounts in Ireland, Luxembourg, and Belgium, accounts belonging to American finance corporation Bank of New York Mellon.
The U.S. authorities state that VimpelCom and MTS used a network of fake companies and bogus contracts for consultation services in order to pay bribes to close relatives of Uzbek President Islam Karimov in exchange for access to the country's telecommunication market.