Ukrainian President Petro Poroshenko and European Council President Donald Tusk have discussed the possible ramifications of the project for construction of the Nord Stream 2 gas pipeline.

"We have also coordinated on our positions and the threats related to the Russian politically-motivated Nord Stream 2 project, which is aimed against the entire European Union, not Ukraine alone," Poroshenko said in his joint statement with Tusk in Brussels on Thursday.

Diversification of energy supplies, energy security and efficient cooperation remain on the agenda for both Ukraine and the European Union, Poroshenko added.