Police in Rot am See said that the killings were 'a family drama'.
German police have held a 26-year-old man in custody in the town of Rot am See over the suspected murder of his mother and father, aunt and uncle and stepbrother and sister in a shooting on Friday.
The man was arrested after calling police from the murder scene and claiming that he had shot several people.
It later emerged that the suspect's 65-year-old father and 56-year-old mother were among the dead, as well as two men and two women, an aunt and uncle and his step-siblings.
A 12-year-old and 14-year-old, also relatives of the suspect, were threatened but not harmed, police said.
In a statement, the authorities said that the suspect called police at around 12.48 pm and stayed on the line until officers arrived around nine minutes later. When arrested, the suspect was carrying 9mm semi-automatic pistol.
Eventually around 100 officers were deployed at the scene.
Although they have not revealed a motive, in a statement police said they suspect 'a family drama'.