"If a travel ban is compelled anywhere, it’s compelled in a country like North Korea, which is under a series of UN Security Council resolutions for being a dire threat to its neighbors, and is responsible for crimes against humanity,", a lawyer who helped draft sanctions against North Korea, Joshua Stanton, told the Wall Street Journal.
At least three foreigners have been sentenced to long prison terms or hard labor since March when the United Nations passed tougher sanctions on Pyongyang over its nuclear weapons program.
In March, US student Otto Frederick Warmbier was jailed for 15 years for trying to steal a political banner, an action that was classified by Pyongyang as a "hostile act" against the government.
The Department of State does not currently restrict US citizens from traveling to North Korea but advises against such trips, noting that Americans have been subject to arrest and long-term detention for actions that would not be cause for arrest in the United States or other countries.