Ukraine and Estonia will exert maximum efforts to stop the political project Nord Stream 2, and Kyiv is ready to guarantee the reliability of gas transit through Ukrainian territory, Ukrainian President Petro Poroshenko has said.

"We have discussed in detail the issue of Nord Stream 2. We clearly stated that this project is not an economic project, it harms European unity. We clearly stated that for today we need to exert maximum efforts to stop a political project that destroys unity of European Union," Poroshenko said during a joint press conference with President of Estonia Kersti Kaljulaid in Kyiv on Tuesday.

He also said that he assured his Estonian counterpart that Ukraine is ready to give any guarantees of the reliability and efficiency of energy transit through Ukraine.

"Ukraine has unique opportunities, underground storage facilities. It has a sufficient reserve to increase the volume of transit," the Ukrainian president said.