Germany has banned a far-left internet portal accused of inciting violence and rallying activists who rioted during last month's G20 summit in Hamburg.
It is now a crime to continue using the site, linksunten.indymedia, Interior Minister Thomas de Maizière said.
Police have seized computers and some weapons in raids on addresses of activists in the south-western Baden-Wuerttemberg region.
Dozens of anti-capitalist protesters clashed with police during the G20.
In a tweet, the German interior ministry described the portal as "the central communications platform among far-left extremists prone to violence".
It said the site was used to exchange tips about violent protest methods and to spread "anti-constitutional extreme left-wing content".
