The waters of Rome's iconic Trevi Fountain turned black Sunday after climate activists dyed it in protest of fossil fuels.

At least eight individuals with the group Ultima Generazione took part in the "Let's not pay for fossil" protest and used "vegetable charcoal" to dye the waters of the legendary fountain black, according to a report.

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The incident was captured on camera, and footage of the protest has gone viral on Twitter.

Videos show the activists leaping into the fountain and using buckets to dump the black substance as a crowd looks on.

Italian authorities arrived on the scene within 15 minutes and took the activists into custody, the report noted.

Sunday's protest was a reaction to the visible effects of climate change in the country, including this month's deadly flooding in northern Italy's Emilia Romagna region, according to Ultima Generazione.

At least 14 people were killed due to the flooding, and thousands of Italians were forced from their homes.

It was because of this "horrible tragedy" that 19-year-old "Mattia" joined the protest, according to a release by Ultima Generazione.

"[It's] a warning of the dark future that awaits humanity, made up of drought alternating with increasingly frequent and violent floods," Mattia said.

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"The only way to prevent this from happening is to stop emissions related to fossil fuels. Our Government, on the other hand, continues undaunted to give the fossil fuel industry public funding for tens of billions of euros every year."

"No damage" was done to the Trevi Fountain, according to Ultima Generazione.