Italian Olympic Committee gets Sochi terror threats
CONI 'serene', trusts security measures22 January, 13:24
Slovenia's committee also said it got a threatening letter, which it forwarded to police.
The threats were reportedly made in Russian and English.
Hungary's committee said a threat against its athletes had been investigated and declared "non-threatening".
It said that Hungary and other nations had received an email written in Russian and English, threatening attacks against athletes.
The British Olympic Association said it was not aware of any credible threat against its athletes or delegation.
The threats come after Russian security officials said they were hunting three potential female suicide bombers ahead of the games.
One of the suspects, 22-year-old Ruzanna Ibragimova - the widow of a suicide bomber - was reported to be at large in Sochi itself.
The other two suspects were identified as Zaira Aliyeva, 26, and Dzhannet Tsakhayeva, 34.
Police said the three were been trained "to perpetrate acts of terrorism".
Last month the southern city of Volgograd was rocked by two suicide bombings, which killed 34 and injured dozens more.