Both the Konrad Adenauer Foundation (KAS) in St Petersburg and the Friedrich Ebert Foundation (FES) in Moscow were investigated earlier.

BBC: Fears for NGOs in Russia as tax raids multiply

At least two German NGOs - the Konrad Adenauer Foundation (KAS) in St Petersburg and the Friedrich Ebert Foundation (FES) in Moscow - were among those searched.

BBC: Angela Merkel tells Vladimir Putin - Russia needs NGOs

However, a study published in 2011 by the Friedrich Ebert Foundation suggests that "widespread" racist and anti-Muslim attitudes in Europe are no less common in Germany than in countries such as France, Italy or the Netherlands.

BBC: Q&A: German far right bucks European trend