Hundreds of climate change activists have stormed an open cast coal mine in western Germany to campaign against fossil fuels.
Police had warned that the mine was not safe and said some officers were hurt as they tried to hold back protesters.
Germany has vowed to go carbon neutral by 2050 but activists say this is not soon enough.
Recent surveys have shown that climate change tops a list of concerns in Germany, with the Green party polling alongside the governing Christian Democrats.
Earlier in the day, protesters temporarily blocked a railway line used to transport coal.