The warning was issued by the US Department of State, through its Bureau of Consular Affairs, in a post on its official Facebook page on Monday.
Washington said the 23 countries are under its highest warning, Level 4, which means “Do Not Travel.”
The department said it gave the warning because of security concerns, the situation on ground in those countries, and because the US government may not be able to help its citizens if they go there.
It said Level 4 is for places that are dangerous.
“Level 4 means DO NOT TRAVEL. We assign Level 4 based on local conditions and/or our limited ability to help Americans there. These places are dangerous. Do not go for ANY reason,” the department stated.
The department also told Americans to check its official travel advisory website for updates on each country before they travel.
The countries affected include Afghanistan, Belarus, Burkina Faso, Burma, the Central African Republic, Chad, the Democratic Republic of the Congo, Haiti, Iran, Iraq, Lebanon, Libya, Mali, Niger, North Korea, Russia, Somalia, South Sudan, Sudan, Syria, Uganda, Ukraine and Yemen.
