South Korean immigration officials said they have deported 17 foreigners who could “potentially pose a terrorist menace” to the 2018 Winter Olympics in PyeongChang.
The deported foreigners come from five unidentified countries in Southeast and Central Asia, according to local paper the Korea Times, and are all either members of international terrorist groups as defined by the South Korean government, or on a wanted list shared by a global network of intelligence agencies.
The deportations were made possible through the “close cooperation and intelligence sharing of spy agencies in 50 countries,” an official at the Korea Immigration Service said. “We don’t rule out the possibility that foreign terrorists could enter [the country] by pretending to be Olympics travelers or hired workers at Korean companies. So we have to be vigilant before and during the Olympics.”
Read more: Nikki Haley Questions U.S. Participation in the Winter Olympics Amid Tensions With North Korea
Besides working with overseas spy agencies, South Korea emergency services have conducted anti-terror drills around the country’s Olympic venues, which will be guarded by a contingent of around 5,000 armed forces personnel during the Games.
More Must-Reads From TIME
- The 100 Most Influential People of 2024
- The Revolution of Yulia Navalnaya
- 6 Compliments That Land Every Time
- What's the Deal With the Bitcoin Halving?
- If You're Dating Right Now , You're Brave: Column
- The AI That Could Heal a Divided Internet
- Fallout Is a Brilliant Model for the Future of Video Game Adaptations
- Want Weekly Recs on What to Watch, Read, and More? Sign Up for Worth Your Time
Write to Joseph Hincks at joseph.hincks@time.com