The son of a former German president has been stabbed to death while he was giving a lecture in Berlin.
A man, 57, has been arrested by police in connection with the death of Fritz von Weizsaecker, who had been giving a lecture about the fatty liver disease at a hospital where he worked as a head physician.
A member of the audience got up and attacked him with a knife as he spoke at the Schlosspark-Klinik on Tuesday night.
Mr von Weizsaecker, 59, died at the scene.
Police said: “We cannot yet say anything about the attacker’s motive.”
An off-duty police officer in the audience who tried to intervene to save Mr von Weizsaecker was left seriously wounded and underwent surgery.
Christian Lindner, the head of the Free Democrats party, of which Mr von Weizsaecker was a member, expressed his shock at the physician’s death.