Authorities in Berlin on Wednesday searched more than two dozen buildings connected to three alleged Islamic extremists suspected of planning to carry out attacks in Russia.
Prosecutors said some 140 police officers launched a dawn raid on 26 residences and other locations in Berlin.
Holger Freund, a spokesman for Berlin prosecutors, said the investigation was focused on three German men with "Arabic backgrounds" aged 28, 30 and 36 living in Berlin, but declined to identify them further.
Freund said police did not have sufficient evidence at this point to arrest them or anyone else in an extremist group that is believed to include between 15 and 24 people.
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