The U.S. has filed to seize $300 million in alleged bribes that it claims were handed over by two major Russian telecoms firms to a close relative of Uzbek President Islam Karimov in exchange for access to the Uzbek telecoms market, news agency Bloomberg reported Tuesday. The complaint filed by the U.S. Justice Department in a Manhattan federal court on Monday claims that leading Russian mobile phone operator MTS and fellow telecoms major VimpelCom - owned in part by Russian billionaire Mikhail Fridman - bribed a relative of Karimov's, the report said.