The left-wing extremist “Vulcan Group” claims responsibility for the attack. In a letter of responsibility, the “volcano group” praises itself for the crime.

The group is said to have been founded in 2011 and is assigned to the anarchist spectrum by the Berlin Office for the Protection of the Constitution. The number of members and the exact organizational structure are not known, but it can be seen that the intelligence service is based on a consolidated structure. The authors claim: "We have ruled out any danger to our lives and the lives of others"