Vandals scratched a swastika into one of the slabs that makes up Berlin's Holocaust memorial at the weekend, police said.
Security officers found the swastika on Saturday morning, a police statement said. The damage was swiftly repaired, but there was no information on who was responsible.
The memorial - a vast field of more than 2,700 gray slabs situated close to the Brandenburg Gate in the heart of Berlin - opened to the public in May 2005.
Authorities have said the memorial, which is freely accessible around the clock, drew some 3.5 million visitors in its first year. Although the slabs are covered with an anti-graffiti coating, five swastikas and four stars of David were reported in the same period.