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

The other groups targeted by the raids include Freedom House, the International Center for Journalists and the Konrad Adenauer Foundation.

CNN: Trial of NGO workers set to resume in Egypt

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

The CDU's tax-cut proposal is not a pledge of immediate relief but a signal that the party is on the side of the economy's producers, says Viola Neu, a political scientist at the CDU-linked Konrad Adenauer Foundation.

ECONOMIST: Tax cuts emerge as a central issue in the election campaign