Fugu blowfish fail sparks emergency warning in Japan city

Deadly blowfish (or Fugu) is a delicacy in Japan.

(CNN)A Japanese city issued an emergency alert to residents Monday after two people ate potentially dangerous portions of fugu fish that should not have been sold.

Five packs of Yorito fugu (blunt head blowfish) were sold at a supermarket located in Gamagori city, in the central Aichi prefecture, by a licensed employee who had not removed the livers, according to Hiroko Mizuno, an official from the district's Life and Hygiene Department.
The fish, also referred to as puffer fish, contains a toxin hundreds of times more poisonous than cyanide; its liver alone can contain enough poison to kill five men. Japan has laws in place to ensure it is prepared and detoxified properly before it is sold.
    Fugu, with its lethal innards, is considered a winter time delicacy in Japan, with high-end Tokyo restaurants charging customers 22,000 yen ($199 US) to risk death.