The Biden administration is urging U.S. citizens in Belarus to depart the country immediately and warned against travel there in a statement published Monday.

The updated travel warning comes after bordering countries Lithuania, Latvia and Poland have stepped up security along the border over concerns about Russian Wagner mercenary forces exiled in the country.

The State Department, in its warning, encouraged Americans still in Belarus to depart the country immediately and categorized the country as a Level 4 risk, the highest security warning.