The state's recent crackdown on the "last generation" could incite individuals against it, warns extremism researcher Matthias Quent. So far, however, there are no indications of radicalisation, he says.

Around 170 officers searched 15 homes and business premises in seven federal states on Wednesday. The accusation is of forming or supporting a criminal organization. Seven defendants, who are between 22 and 38 years old, are being investigated. The activists vehemently denied being criminals. The group regularly draws attention to the consequences of global warming with sit-ins and actions in museums.