The State Department commands the families of embassy workers to depart Belarus.

On Monday, the U.S. Department of State issued a travel advisory for Belarus, an Eastern European nation that is strongly associated with Russia, and ordered family members of government employees to leave the country.

The order was made public on Monday in a travel advice posted on the department’s website. The U.S. described the advisee’s main contributing factor as the heightened tensions in Europe over a possible Russian invasion of Ukraine.

The advisory states, “U.S. citizens located in or considering travel to Belarus should be aware that the situation is unpredictable and there is heightened tension in the region due to an increase in unusual and concerning Russian military activity near the border with Ukraine.”

About 100,000 Russian troops have been stationed along the border.