IOC dismisses latest Sochi terror scare
One of the Olympic torches rises in front of a poster with the Sochi 2014 Winter Olympic logo in Moscow, on October 7, 2013 - by Kirill Kudryavtsev
Federations from Britain, Italy, Germany, Hungary and Slovenia were among those that indicated they had received emails or letters with similar content, which were passed to the IOC security advisers for inspection.
In a swift reply, the IOC said: "We have been in close contact with Sochi 2014 on this matter and our line is as follows -- the IOC takes security very seriously and passes on any credible information to the relevant security services.
"However, in this case it seems like the email sent to a number of NOCs contains no threat and appears to be a random message from a member of the public."
In Britain the director of communications of the British Olympic Association, Darryl Seibel, confirmed that they had received a suspicious e-mail but had been told by the IOC that there was "nothing of substance" to it.
"In addition we have had our own experts take a look at this and they have responded in exactly the same way by stating that this is nothing credible.
"Organisations like ours receive correspondence of every type and it is not uncommon to come across something like this that lacks credibility."
The Sochi resort in Russia is at the foot of the Caucasus mountains. Islamist insurgents based in North Caucasus republics such as Dagestan are seeking their own independent state and have vowed to disrupt the Games in an effort to undermine Russia's President Putin.
Doku Umarov, the chief of militants in the Caucasus, threatened in July to stage attacks to stop the Games from taking place as planned from February 7-23.