(Bloomberg) – German police cordoned off part of a train station in Hamburg and isolated two people to reduce the risk of the deadly Marburg virus spreading.

A medical student who was traveling to Hamburg from Rwanda reported that he might have contracted a tropical disease, according to the local government. The person had been working at a hospital in the African country that had also treated people with Marburg. Upon arrival on Wednesday, the student and a companion were isolated and transported for more testing.