A cancer ward in a German hospital has been hit by an outbreak of coronavirus cases.
Around 20 patients and 20 employees tested positive for Covid-19 at the University Medical Centre Hamburg-Eppendorf (UKE) last week, the hospital confirmed to CNN on Wednesday.
Some of those patients are still being cared for at the Hamburg hospital, while others have since been sent home.
''The exact chain of infection is currently being investigated at full speed and cannot be traced back to a single person," a UKE spokesperson said.
All the patients on the oncology ward were tested after the first infection became known, the UKE said. Infected patients were transferred to specific Covid-19 wards to continue their treatment.
Staff members from a wide range of professions tested positive for the virus and are currently in isolation at home, the hospital statement concluded.
Hamburg is one of Germany's coronavirus hotspots. A total of 3,869 people in the city have been infected with the virus and 67 have died, according to figures released Wednesday by the Robert Koch Institute, Germany's disease control and prevention agency.