Ukrainian businessman Dmytro Firtash has said that he is ready to act as a negotiator between Moscow and Kyiv to try to find a solution to the Ukrainian crisis.

"I'm ready to act as a negotiator between Russia and Ukraine," he said in an interview with Bloomberg.

"I know what to do. If Ukrainian politicians are impotent, I have to step in," said Firtash, who is in Vienna.

Speaking about who he supports in the presidential election in Ukraine, he noted that the important thing for him was to achieve the defeat of Yulia Tymoshenko.

"I am supporting Poroshenko, I don't have any other choice. I'll support anyone other than Tymoshenko," the businessman said.

Firtash said that he stood for Ukraine's transition to federalism.

"We have to give the regions the chance to run their own affairs. Only 15 percent of taxes stay in the regions and 85 percent goes to the center, compared to 50-50 in Austria and 80-20 in Germany. That's why I support federalism," he said.

Shortly before his arrest in Vienna, when Russia was laying the groundwork for its annexation of Crimea, Firtash said he met in London with U.K. Foreign Office officials who were keen to hear his views on how to deal with Putin.

"I tried to convince them that imposing sanctions against Russia was a bad idea. It's better not to pressure him because that will only make things worse. America provoked [Russian President Vladimir] Putin into this situation," he said.

According to earlier reports, Firtash was arrested in Austria at the request of the FBI on March 12. A Vienna court sentenced him to extradition arrest, but agreed to release him on a 125-million-euro bail.

He also signed a written promise not to leave Austria.