He announced at a press conference in Kharkiv on Friday, Censor.NET reports citing Interfax-Ukraine.
"The U.S. is present in the Normandy Format; we have comprehensive information, and the Americans will have all of it. We see no threat of the sanctions being lifted," Poroshenko said.
In 2014, the European Union, the United States and several other countries imposed sanctions against Russia following its occupation of Crimea and aggression in eastern Ukraine. These restrictive measures were repeatedly extended and expanded. In particular, the talks on visa waiver and a new basic agreement on cooperation were suspended; several Russia's officials were banned to travel to the EU while their assets were attached. Trade, financial, and military restrictions were introduced.