Ukrainian President Petro Poroshenko and his Estonian counterpart Kersti Kaljulaid have discussed issues of bilateral cooperation and interaction within the framework of international organizations, including further development of trade, economy and investment.

The two presidents also discussed security issues, Poroshenko's press service said. "They have coordinated approaches to countering hybrid challenges from the Russian Federation, as well as joint urgent steps for the release of Ukrainian political prisoners in Russia," it said.

Poroshenko thanked Kaljulaid for political support of Ukraine and active assistance, including through projects to rebuild infrastructure in the east of Ukraine.