In rubber boats and in the water, 20 environmental activists from Greenpeace protested against oil imports from Russia off Fehmarn on Wednesday morning.

They used yellow paint to paint "Oil fuels war" in letters about 1.5 meters tall on the wall of the 100,000-ton crude oil tanker "Stamos", which transported oil from the Russian Baltic Sea port of Ust-Luga to Rotterdam delivers, as the environmental organization announced on Wednesday.

"Putin is financing the war in Ukraine with the exports of oil, coal and gas," said Greenpeace oil expert Manfred Santen.

The environmentalists are demanding that the daily transport of millions of tons of fossil fuels via the Baltic Sea to Western European ports be suspended as soon as possible.

According to Greenpeace, since the beginning of the war 237 tankers have left Russia with oil and gas - many of them bound for Europe.

The activists have to answer for dangerous interventions in shipping, as the federal police announced.

Greenpeace blocked the route with inflatable boats and repeatedly dropped people in the tanker's immediate course line into the water.

The organization provoked such a significant evasive maneuver.

Greenpeace accepted considerable dangers for shipping, the environment and its own activists during the campaign.

Greenpeace activists have been protesting against the imports in Germany and other European Union (EU) countries for weeks, most recently on the Baltic Sea off Denmark.

The import of gas, oil and coal from Russia is still possible despite far-reaching EU sanctions because of the Russian war of aggression in Ukraine, because countries like Germany do not consider the energy supply of the EU to be secure without the deliveries.

Greenpeace is calling for a switch to renewable energies and a ban on imports of gas, oil and coal from Russia.

"The EU summit this Thursday must urgently pass resolutions for a rapid energy embargo against Russia," said German Greenpeace Managing Director Martin Kaiser of the German Press Agency in Berlin.

It is irresponsible that the EU states are pouring hundreds of millions into Putin's war chest every day with their payments for energy supplies.