Vladimir Putin has called "a legend" the possibility of the leak of nuclear technologies or materials from Russia. In an interview with the ABC television company the Russian President stressed that such possibility "does not correspond to reality." "It can be presumed that someone tried to sell some nuclear secrets but we don't have documentary confirmations of such cases," Putin said. The Russian President called "the problem of the non-proliferation of nuclear weapons" one of "the most serious threats of contemporaneity." Putin stressed that it is necessary to unite the efforts to counter the possible proliferation of nuclear technologies and mass destruction weapons.