The communique in German can be found here.
We are not going to attempt a proper translation, but in brief it claims responsibility for attacks (broken glass and graffiti) to the Supreme Court in Zurich and an AXPO (public power company behind nuclear plant construction) building. (night of July 22 to 23)
They also mention that the Supreme Court is where eco-anarchist Marco Camenisch was tried in 2004.
The attacks are claimed in solidarity with eco-anarchists Silvia, Billy and Costa who were recently sentenced to over three years in prison each.
It is signed simply: Solidarität!