The Berlin headquarters of Germany’s Social Democrats (SPD) had to be evacuated on Tuesday after receiving a bomb threat.<br /><br /> Police later said no device was found.<br /><br /> It is believed the incident was linked to party leader Sigmar Gabriel’s visit to the town of Heidenau which has been the scene of violent right-wing protests over a refugee centre.<br /><br /> The SPD’s secretary general Yasmin Fahimi said that irrespective of the threat, there had been a flood of racist emails over the past 24 hours, some of them with criminal content which will be reported to the police. It’s thought the bomb threat against Willy-Brandt-Haus is all part of a campaign of hate and violence.<br /><br /> There has been a recent spate of arson attacks across Germany including the burning down of a sports hall in the town of Nauen near Berlin, where some 130 asylum seekers were due to be housed. No one was hurt.<br /><br /> Last weekend’s clashes with police in Heidenau in which 30 officers were injured, underscores how tense the situation
