The U.S. State Department on Friday said U.S. citizens would be subject to a geographic travel restriction, barring them from visiting North Korea, citing the risk of long-term imprisonment.

The news follows similar reports from Friday, when several travel companies which conduct tours to the DPRK said the ban would be in effect from July 27.

“Due to mounting concerns over the serious risk of arrest and long-term detention under North Korea’s system of law enforcement, the Secretary has authorized a Geographical Travel Restriction on all U.S. citizen nationals’ use of a passport to travel in, through, or to North