BERLIN (AA) – Germany’s Berlin Brandenburg Airport was paralyzed for nearly two hours on Thursday due to a protest by climate change activists.

The activists from the Last Generation group used a bolt cutter to cut the fence and entered the tarmac, and later glued themselves to runways to stop take-offs and landings.

“Airplane is not a means of transport for ordinary citizens. Most people – about 80% – have never flown,” the activists said on Twitter, as they live-streamed their protest.

“One wealthy percent of the population alone causes about half of the flight-related emissions,” they said, and called on people to stop traveling by air.

Berlin Brandenburg Airport said runways were reopened after security officials intervened and brought the situation under control, while there were delays in flight operations because of the climate protest.