Terrorist attacks near Sochi have caused huge concern among Olympic players and fans, some of them contemplating the idea of boycotting the quadrennial sports event. The Olympics is set to start on February 7 and safety of the fans and players remain a huge concern among authorities.

Right now, European and US officials are on high alert following the discovery of threats against Sochi Olympic participants. The U.S., Germany, Hungary, Italy, Slovakia and Slovenia said they received the threats in the form of emails and handwritten letters from still unidentified senders.

"Persons attending the Olympic Games might be blown up," read a portion of a message sent to Hungary.

"We have received the email in question and we have forwarded the message to the appropriate authorities," USOC CEO Scott Blackmun said.

"The safety and security of Team USA is our top priority. As is always the case, we are working with the U.S. Department of State, the local organizers and the relevant law enforcement agencies in an effort to ensure that our delegation and other Americans traveling to Sochi are safe."

This is not the first time that gigantic sports event was threatened. Last month, the Olympic committee was shocked by a bombing in Volgograd Train Station in southern Russia that killed at least 15 people. Russian authorities believe that perpetrators were members of the Caucasus Emirate which is lead by Chechen rebel fighter Doku Umarov. This group vowed to target Sochi for hosting the sports event which they call 'Satanic.'

The Olympics are expected to bring 6,000 athletes from 85 countries to Sochi. The Olympic Committee and the Russian government are planning to protect the public through the help of around 40,000 security officers standing guard.

While some people fear for their lives, some athletes think there's nothing to be afraid of.

"There's no doubt that what's happened lately is certainly -- (terrorists are) trying to obviously shake us and probably in a lot of cases they are succeeding. But ... we have to try and fight through that," said Canada's men's hockey team assistant coach Claude Julien.

"At the same time, you have to hope that the people in charge are doing the best they can. There's never any guarantees in this life and you'd like to make it as safe as possible. That's basically all I can say, because my job is to go there and help coach a team and hope that the people in charge of that are going to do the best job they can and make it a successful Olympics."