he fifth president of Ukraine, leader of the European Solidarity party, Petro Poroshenko, on the air of the BFMTV French television channel called on European partners to join efforts to force Russian President Vladimir Putin to peace.

"I am convinced that negotiations should always be continued. And diplomatic means to stop the fire is exactly what we need now. But for those who are negotiating, there are a few recommendations. The first recommendation is no compromises at the expense of Ukraine, because this is weakness, and Putin very effectively uses weakness," the European Solidarity press service said, citing Poroshenko.

"The second recommendation is do not trust Putin. Not once did he adhere to the obligations that Russia and Putin took upon themselves. We must be strong and force Putin to peace," Poroshenko said.

"I would like to emphasize that those who think that a conventional war is going on in Ukraine now are deeply mistaken. For Putin's attack on nuclear power plants means that elements of the nuclear threat in this war already exist. Nuclear pollution has no boundaries. It easily crosses borders – including those of NATO countries. And here you cannot apply Article 5 already. If Putin does not stop, if Putin does not withdraw troops, you must tighten the sanctions. Increase military assistance to Ukraine, make the Ukrainian Armed Forces more powerful, and it is through such mechanisms to stop Putin as an aggressor," the politician said.