“We are the last generation capable of preventing the point of no return,” three young activists from the Last Generation group shouted at the festival’s premiere of “Jedermann” (Each Man) late Friday, before being escorted away by security, according to a video posted by the group on social media.

Founded in 1920, the Salzburg Festival is one the world’s top classical music festivals.

“The citizens of the Last Generation Austria demand that we face this question as a whole society,” the group said in a statement. “Especially now, when global heating is getting more out of control and is making itself felt all over the world with ever more extreme temperatures and ever more destructive weather, they can no longer look away.”

The protest came as swathes of southern Europe and the United States were baking in record heatwaves.

The festival disruption marked the latest protest by climate activists at high-profile venues.

At the golf British Open on Friday, protesters set off a smoke flare and threw orange powder onto the course before being arrested.

During the recent Wimbledon tennis tournament, protesters from the Just Stop Oil campaign group disrupted play by running onto courts in two separate incidents. The group had previously targeted the Ashes cricket series and the English Premiership Rugby final.

In recent months, climate protesters have also glued themselves to the base of an ancient sculpture at the Vatican Museums; to Johannes Vermeer’s “Girl With a Pearl Earring” painting at The Hague; and to works by Francisco Goya in Madrid.

In Germany, activists have flung mash at a Claude Monet work and in London’s National Gallery, they have dumped cans of tomato soup over the glass protecting Vincent van Gogh’s “Sunflowers”.