The South Korean Embassy in Iran has advised Korean nationals in the country to leave while commercial flights remain available.
"If the local situation deteriorates rapidly, civilian flights could be suspended," the embassy announced on its website on the 22nd. A Level 3 travel advisory, or "red alert" recommending departure, is currently in effect for all regions of Iran.
"Korean nationals staying in Iran should leave promptly unless they have urgent business," the embassy said. "Those planning to travel to Iran should cancel or postpone their trips."
The embassy explained the advisory was issued because "recent media reports indicate that regional tensions are escalating sharply due to the possibility of a U.S. attack on Iran and warnings of Iranian retaliation."
The Ministry of Foreign Affairs stated on the 23rd that "our government issued a Level 3 travel advisory for all of Iran following the Iran-Israel armed conflict in June of last year, and it remains in effect. The embassy has been actively urging Korean nationals to leave the country."
The ministry added it is "closely monitoring local developments and the safety of our nationals, keeping in mind the possibility of rapid changes in the situation."
Approximately 50 Korean nationals remain in Iran.
U.S. President Donald Trump, when asked on the 20th (local time) about the possibility of attacking Iran, responded, "I would say it's something that's being considered."