Russia plans to take back around 1 million tonnes of contaminated oil from Belarus, cleaning up the Druzhba export pipeline section leading to Poland and Germany, four industry sources familiar with the plan told Reuters.

An estimated 5 million tonnes of contaminated oil – which is being removed using pipelines, storage, railcars and by the sea - got into in the Druzhba pipeline last month, forcing Russia to stop flows to customers in Belarus, Ukraine, Poland, Germany and a number of central European countries.

A month ago, Russia had to stop exports via the Druzhba pipeline to Poland and Germany via the northern branch of the line and to Ukraine, Hungary, Slovakia and the Czech Republic in the south. The routes split at the Mozyr refinery in Belarus.

The plan was discussed at talks in Warsaw between Russian, Belarussian and European companies. Another roughly 1 million tonnes stuck in Poland and Germany will be left there to be dealt with by the countries, the sources said.

"The Russians are open to agreeing to take back the polluted oil from the Belarus section which has not come to Poland yet, but there is no agreement on compensation," a source said.