Several thousand Germans demanding an end to the use of nuclear energy have taken part in nationwide demonstrations, including a rally outside of energy company RWE's headquarters.
Police said about 3,000 people protested Saturday outside of RWE's headquarters in Essen, according to the DAPD news agency.
On Friday, RWE filed a lawsuit demanding two of its nuclear reactors that are to be taken off the grid in the wake of Japan's Fukushima disaster be allowed to remain operational.
About 7,000 people took part in anti-nuclear protests in Bremen. Other smaller rallies were held elsewhere.
Chancellor Angela Merkel hastily announced the shut down of seven of the nation's nuclear power plants in the wake of the Japan nuclear crisis.