At least nine people were killed late on Wednesday as a 43-year-old German man went on a shooting rampage in the western town of Hanau, targeting customers at two separate shisha lounges.
The suspect and his mother were found dead in his apartment early on Thursday after a huge manhunt.
Police are attempting to identify the victims.
Federal prosecutors have said there are indications of a far-right motive.
Police said the two crime scenes were at Heumarkt, in the centre of Hanau, and Kurt-Schumacher-Platz in the western neighbourhood of Kesselstadt, about 2km (1.24 miles) away. The suspect’s apartment was also in Kesselstadt.