<span style="color: #222222;">In Japan, nine companies, including drugmakers and a newspaper, have received blackmail letters containing white powder suspected to be cyanide.</span><br />'' <br />'' <span style="color: #222222;">Police said the letters were sent under the names of executed members of the Aum Shinrikyo, the Japanese doomsday cult behind the deadly 1995 sarin gas attack in Tokyo.</span><br />'' <br />'' <span style="color: #222222;">The sender has demanded 35 million won, approx 31,000 dollars, in virtual currency- bitcoins.</span><br />'' <br />'' <span style="color: #222222;">The letter said, if money was not transfered by 22nd February, they will start making fake medicine containing highly toxic potassium cyanide and distribute it, which may lead to a tragedy.</span><br />'' <br />'' <span style="color: #222222;">As per a local media reports, Similar threatening letters were sent to some pharmaceutical companies in Osaka in January last year. </span><br />