German police have carried out anti-terrorism raids in 4 states, focusing on suspected members and supporters of so-called Islamic State.
Houses and properties have been searched in Bavaria, Berlin, Saxony and Saxony-Anhalt through the pre-dawn operation, federal prosecutors say.
Police have been on the lookout for three suspects – two of them are believed to be IS members and the third a supporter of the jihadist group.
No arrests have been made.
After struggling a sequence of lethal assaults final 12 months, Germany has been in concern of additional violence.
On Tuesday, the authorities made an arrest linked to an alleged plot to murder a senior public figure.