The US has added two countries to its “do not travel” list.

Last month, government officials added North Korea and Burkina Faso to the list of countries Americans are advised against visiting.

The State Department has four travel advisory levels: exercise normal precautions, exercise increased caution, reconsider travel, and do not travel.

The threat level in North Korea and Burkina Faso has been upgraded to Level 4.

Travel to North Korea has been discouraged due to “the continuing serious risk of arrest, long-term detention and the threat of wrongful detention.”

Visiting Burkina Faso has been advised against because of increased “terrorism, crime and kidnapping.”

This update has brought the number of countries Americans should avoid visiting to 21.

Certain parts of Mexico have also been issued Level 4 warnings, although the travel advisory level for Mexico as a whole has remained at Level 2 (“Exercise increased caution”) for several years.

The announcements come amid rising global tensions and security situations in several regions.