A Russian probe into the death of Palestinian leader Yasser Arafat has found that his death wasn’t caused by radiation — a finding that comes after a French probe found traces of the radioactive ...

Polonium, Novichok and now dart frog poison: the finding that Russian opposition leader Alexei Navalny was killed with a rare toxin has revived the spectre of Moscow's use of poisons against opponents ...

Polonium 210--the substance that killed Alexander Litvinenko--has turned up in Hamburg, and Interpol and German police are on the case, with Chancellor Angela Merkel saying such killings are not "a ...

MOSCOW -- Ninety-seven percent of the legal production of one of the world's rarest industrial products -- the intensely radioactive isotope polonium-210 -- takes place at a closely guarded nuclear ...

Five European countries said that Russian opposition leader Alexei Navalny was killed by a "rare toxin" from a dart frog - Copyright ANP/AFP Laurens Niezen Five ...