Local authorities say one person is dead and a dozen injured in an explosion today near Nuremberg, Germany, that appears to be intentional. A police spokesman said the dead man was carrying a backpack with an explosive device and likely was acting alone.

The blast happened outside a restaurant in Ansbach, prompting authorities to evacuate about 2,000 people at a nearby music festival. There was no official word on motive or details about the dead suspected bomber. There has been no claim of responsibility for the blast.

It was the fourth violent incident in a week to hit southern Germany. Earlier today, a 21-year-old Syrian refugee was arrested for killing a pregnant woman and wounding two others with a machete near Stuttgart. In Munich on Thursday, an Iranian-German teenager killed at least nine people and wounded dozens of others in a shooting rampage. On Monday, A 17-year-old Afghan slashed several people with an ax on a train while shouting “Allahu akbar,” then attacked a woman walking her dog before he was killed by local police.