An arson attack was carried out on the constituency office of Federal Family Minister Lisa Paus (Greens) in Berlin-Charlottenburg.
The abbreviation NSU was written on a construction site protection at the house, said a police spokeswoman on Wednesday.
The police are investigating whether the graffiti is new, whether it is connected to the arson attack and whether the perpetrator is from the right-wing extremist spectrum.
Nobody got hurt.
NSU is the abbreviation for the terrorist group "National Socialist Underground", which murdered eight small business owners of Turkish origin and one with Greek origin, as well as a German policewoman.
According to the police, an employee of the office testified that the abbreviation had not previously been there.
The fire was therefore noticed on Wednesday night around 0.30 a.m. by the Greens employee, who was still working in the office.
A wooden bench caught fire in front of the house on Windscheidstrasse, and the flames also attacked the window frame of the shop window.
The employee, a passer-by and later the fire brigade extinguished the fire.
The state security agency responsible for politically motivated crimes in the Berlin State Criminal Police Office (LKA) is investigating.
"We won't be intimidated!"
Minister Paus tweeted photos and wrote: "Last night there was an arson attack on @Gruene_CW's shared office with me.
State security is investigating.
The shock is deep, but we won't be intimidated!" The photos show a charred bench made of wooden pallets and the burned window pane.
Bundestag Vice President Katrin Göring-Eckardt (Greens) wrote: "That's terrible, dear Lisa.
Thank God, nothing happened to anyone. ”Several Berlin state politicians tweeted, expressing their solidarity.
The Greens in the Berlin district of Charlottenburg-Wilmersdorf, who also use the office, said: "The act goes beyond party lines and should be condemned as an attack on our democratic system."