Hong Kong said Tuesday it will cut all rail links to mainland China as the United States and other governments prepared to evacuate citizens from the Chinese city at the center of a virus outbreak that has now killed more than 100 people.

Wearing a green surgical mask, Hong Kong leader Carrie Lam told a news conference that train service would stop at midnight Thursday and that the two stations connecting to the mainland would be closed.

She stopped short of a total closing of the border, as North Korea and Mongolia have done, but said that flights from the mainland would be reduced.