Video shows Greta Thunberg smiling as German police carry her away from a coal mine protest

• A video from DW News shows Greta Thunberg smiling as German police carry her away from a coal mine protest Tuesday.
• Thunberg, 20, was part of a group protesting the expansion of a coal mine into the German village of Lützerath.

A video from DW News shows German police carrying environmental activist Greta Thunberg away from a coal mine protest Tuesday.

Thunberg, 20, appears to be smiling as police lifted her over the mud and away from the site of the protest in western Germany.

Thunberg was part of a larger group of protests who broke police barriers around the mine and rushed towards an opening in the coal pits, CNN reported.

Reuters reported that German police said Thunberg was released from custody after she went through an identity check.

It was the Swedish activist's second time being detained at the mine, police told CNN. She was previously taken into custody at the site Sunday and spoke at a protest event Saturday.

"Germany is one of the biggest polluters in the world and needs to be held accountable," she said, according to Reuters.

Thousands of demonstrators attended events over the weekend protesting the expansion of the Garzweiler lignite coal mine, located in the German village of Lützerath.

Thunberg tweeted Friday that she was protesting in the area.