Police in Germany have raided 15 properties across the country in connection with protests by climate activists from the Last Generation group.
The group - called Letzte Generation in German - have been causing large-scale disruption across the country in recent months by glueing themselves to roads and blocking rush-hour traffic.
German authorities on Wednesday searched 15 properties across seven different states in connection with an investigation into the protests, police said.
Prosecutors in the city of Munich are investigating seven suspects aged between 22 and 38 on suspicion of forming or supporting a criminal organisation, a police statement said.
No arrests have been made.
The suspects are believed to have been raising funds to finance further crimes on behalf of Last Generation, collecting at least €1.4 million (£1.2 million) in donations, according to police.
Two of the defendants are suspected of sabotaging the Trieste-Ingolstadt oil pipeline - considered critical infrastructure and therefore subject to special protection - in April last year.
The searches took place in Hesse, Hamburg, Saxony-Anhalt, Saxony, Bavaria, Berlin and Schleswig-Holstein.
