The U.S. Department of State have issued an updated travel warning for North Korea on Tuesday, replacing the previous blanket travel warning which was issued on November 19, 2013.

The latest warning, which is similar to its predecessor, contains additional text reminding tourists that traveling within official tour groups, or with registered guides, will not guarantee their safety against arrest.

“In the past 18 months, North Korea detained several U.S. citizens who were part of organized tours,” the warning read, alluding to the detention of North Korea tour operator Kenneth Bae in 2012, 85 year old Korean War veteran Merrill