Unknown perpetrators hurled bottles at a building of the Robert Koch Institute (RKI) in Berlin Schoneberg on General-Pape-Strasse in the morning hours of Sunday.
At 02:40 (01:40 GMT) a security guard saw a number of people throwing bottles against the building, which is one of three RKI offices in Berlin. A window was broken and a fire started, which was extinguished by security staff. No major damage is reported.
Police are investigating if there was a political motivation for the incident.
The RKI is the German government agency with responsibility for dealing with infectious diseases, and as such is at the forefront of efforts to deal with the coronavirus pandemic, reporting daily on the infection figures within Germany, as well as maintaining a list of risk zones in the country and around the world.