(LtoR) EU's High Representative for Foreign Affairs and Security Policy Federica Mogherini talks with Romanian Foreign Minister Teodor Viorel Melescanu, Polish Foreign Minister Jacek Czaputowicz and Ukraine's Foreign Minister Pavlo Klimkin during a EU Foreign Affairs Council meeting at the EU headquarters in Brussels on May 13, 2019. (Photo by JOHN THYS / AFP)

(LtoR) EU's High Representative for Foreign Affairs and Security Policy Federica Mogherini greets Ukraine's Foreign Minister Pavlo Klimkin next to Romanian Foreign Minister Teodor Viorel Melescanu and Polish Foreign Minister Jacek Czaputowicz during a EU Foreign Affairs Council meeting at the EU headquarters in Brussels on May 13, 2019. (Photo by JOHN THYS / AFP)

(LtoR) Ukraine's Foreign Minister Pavlo Klimkin speaks with Polish Foreign Minister Jacek Czaputowicz and Belarusian Foreign Minister Vladimir Makey during a EU Foreign Affairs Council meeting at the EU headquarters in Brussels on May 13, 2019. (Photo by JOHN THYS / AFP)

(LtoR) Ukraine's Foreign Minister Pavlo Klimkin speaks with Polish Foreign Minister Jacek Czaputowicz and Belarusian Foreign Minister Vladimir Makey during a EU Foreign Affairs Council meeting at the EU headquarters in Brussels on May 13, 2019. (Photo by JOHN THYS / AFP)

Belgian Foreign Minister Didier Reynders, left, speaks with Lithuanian Foreign Minister Linas Linkevicius, center, and Ukraine's Foreign Minister Pavlo Klimkin, second right, during a round table meeting of EU foreign ministers and Eastern Partnership nations at the Europa building, Monday, May 13, 2019. (AP Photo/Virginia Mayo)

(LtoR) EU's High Representative for Foreign Affairs and Security Policy Federica Mogherini talks with Romanian Foreign Minister Teodor Viorel Melescanu, Polish Foreign Minister Jacek Czaputowicz and Ukraine's Foreign Minister Pavlo Klimkin during a EU Foreign Affairs Council meeting at the EU headquarters in Brussels on May 13, 2019. (Photo by JOHN THYS / AFP)

(LtoR) EU's High Representative for Foreign Affairs and Security Policy Federica Mogherini greets Ukraine's Foreign Minister Pavlo Klimkin during a EU Foreign Affairs Council meeting at the EU headquarters in Brussels on May 13, 2019. (Photo by JOHN THYS / AFP)

European Council President Donald Tusk (C) leads Romania's President Klaus Werner Iohannis (L), Ukrainian President Petro Poroshenko (2L) and other leaders of the Eastern Partnership group prior to the 10th EU-Eastern Partnership council meeting, in Brussels on May 13, 2019. (Photo by EMMANUEL DUNAND / AFP)

European Council President Donald Tusk (C) leads Romania's President Klaus Werner Iohannis (L), Ukrainian President Petro Poroshenko (2L) and other leaders of the Eastern Partnership group prior to the 10th EU-Eastern Partnership council meeting, in Brussels on May 13, 2019. (Photo by EMMANUEL DUNAND / AFP)

European Council President Donald Tusk (R) leads Romania's President Klaus Werner Iohannis (2L) Ukrainian President Petro Poroshenko (L) and other leaders of the Eastern Partnership group prior to the 10th EU-Eastern Partnership council meeting, in Brussels on May 13, 2019. (Photo by EMMANUEL DUNAND / AFP)

(First row, from L) Foreign Affairs and Security Policy Federica Mogherini, Romania's President Klaus Werner Iohannis, President of the Republic of Azerbaijan Ilham Aliyev, European Council President Donald Tusk, Ukrainian President Petro Poroshenko, European Commission president Jean-Claude Juncker and other leaders of the Eastern Partnership group pose for the photograph during the 10th EU-Eastern Partnership council meeting, in Brussels on May 13, 2019. (Photo by EMMANUEL DUNAND / AFP)

European Union Foreign policy chief Federica Mogherini and Ukrainian President Petro Poroshenko (R) attend a EU/Eastern Partnership diner to commemorate 10 Years anniversary of Agreement in Brussels, on May 13, 2019 (Photo by Olivier HOSLET / POOL / AFP)

(From L) Ukrainian President Petro Poroshenko, European Commission President Jean-Claude Juncker and Moldovan Prime Minister Pavel Filip attend a EU/Eastern Partnership diner to commemorate 10 Years anniversary of Agreement in Brussels, on May 13, 2019 (Photo by Olivier HOSLET / POOL / AFP)

BRUSSELS, BELGIUM - MAY 13 : Ukraine's Minister of Foreign Affairs, Pavlo Klimkin (R) attends the European Union (EU) Foreign Affairs Council (FAC) meeting in Brussels, Belgium on May 13, 2019. Dursun Aydemir / Anadolu Agency/ABACAPRESS.COM

BRUSSELS, BELGIUM - MAY 13 : High Representative of the European Union for Foreign Affairs and Security Policy Federica Mogherini (L), Poland's Foreign Minister Witold Waszczykowski (2nd R), Romanian Foreign Minister Teodor Melescanu (2nd L) and Ukraine's Minister of Foreign Affairs, Pavlo Klimkin (R) attend the European Union (EU) Foreign Affairs Council (FAC) meeting in Brussels, Belgium on May 13, 2019. Dursun Aydemir / Anadolu Agency/ABACAPRESS.COM

BRUSSELS, BELGIUM - MAY 13 : High Representative of the European Union for Foreign Affairs and Security Policy Federica Mogherini (L), Poland's Foreign Minister Witold Waszczykowski (2nd R), Romanian Foreign Minister Teodor Melescanu (2nd L), Ukraine's Minister of Foreign Affairs, Pavlo Klimkin (Front C) and Foreign Minister of Belarus Vladimir Makei (R) attend the European Union (EU) Foreign Affairs Council (FAC) meeting in Brussels, Belgium on May 13, 2019. Dursun Aydemir / Anadolu Agency/ABACAPRESS.COM

BRUSSELS, BELGIUM - MAY 13 : High Representative of the European Union for Foreign Affairs and Security Policy Federica Mogherini (L), Poland's Foreign Minister Witold Waszczykowski (3rd L), Romanian Foreign Minister Teodor Melescanu (2nd L), Ukraine's Minister of Foreign Affairs, Pavlo Klimkin (2nd R) and Foreign Minister of Belarus Vladimir Makei (R) attend the European Union (EU) Foreign Affairs Council (FAC) meeting in Brussels, Belgium on May 13, 2019. Dursun Aydemir / Anadolu Agency/ABACAPRESS.COM

BRUSSELS, BELGIUM - MAY 13 : High Representative of the European Union for Foreign Affairs and Security Policy Federica Mogherini (L), Poland's Foreign Minister Witold Waszczykowski (3rd L), Romanian Foreign Minister Teodor Melescanu (2nd L), Ukraine's Minister of Foreign Affairs, Pavlo Klimkin (2nd R) and Foreign Minister of Belarus Vladimir Makei (R) attend the European Union (EU) Foreign Affairs Council (FAC) meeting in Brussels, Belgium on May 13, 2019. Dursun Aydemir / Anadolu Agency/ABACAPRESS.COM

BRUSSELS, BELGIUM - MAY 13 : Poland's Foreign Minister Witold Waszczykowski (C), Ukraine's Minister of Foreign Affairs, Pavlo Klimkin (L) and Foreign Minister of Belarus Vladimir Makei (R) attend the European Union (EU) Foreign Affairs Council (FAC) meeting in Brussels, Belgium on May 13, 2019. Dursun Aydemir / Anadolu Agency/ABACAPRESS.COM

13 May 2019, Belgium, Brussel: 13.05.2019, Belgium, Brussels: German Minister of Foreign Affairs Heiko Maas (L) is talking with the Croatian Minister of Foreign & European Affairs Marija Pejcinovic Buric (C) and the Austrian Minister of Foreign Affairs Karin Kneissl (R) prior an EU Foreign Affairs Council and Eastern Partnership Ministerial meeting in the Europa building, the EU Council headquarter. The Eastern Partnership (EaP) is a joint initiative of the European External Action Service of the European Union (EU) together with EU, its Member States, and six Eastern European Partners governing its relationship with the post-Soviet states of Armenia, Azerbaijan, Belarus, Georgia, Moldova, and Ukraine. - NO WIRE SERVICE Photo: Thierry Monasse/dpa

13 May 2019, Belgium, Brussel: 13.05.2019, Belgium, Brussels: (From Left) Dutch Minister of Foreign Affairs Stef Blok is talking with the German Minister of Foreign Affairs Heiko Maas the Croatian Minister of Foreign & European Affairs Marija Pejcinovic Buric and the Austrian Minister of Foreign Affairs Karin Kneissl prior an EU Foreign Affairs Council and Eastern Partnership Ministerial meeting in the Europa building, the EU Council headquarter. The Eastern Partnership (EaP) is a joint initiative of the European External Action Service of the European Union (EU) together with EU, its Member States, and six Eastern European Partners governing its relationship with the post-Soviet states of Armenia, Azerbaijan, Belarus, Georgia, Moldova, and Ukraine. - NO WIRE SERVICE Photo: Thierry Monasse/dpa

13 May 2019, Belgium, Brussel: 13.05.2019, Belgium, Brussels: German Minister of Foreign Affairs Heiko Maas (L) is talking with the Croatian Minister of Foreign & European Affairs Marija Pejcinovic Buric (C) and the Austrian Minister of Foreign Affairs Karin Kneissl (R) prior an EU Foreign Affairs Council and Eastern Partnership Ministerial meeting in the Europa building, the EU Council headquarter. The Eastern Partnership (EaP) is a joint initiative of the European External Action Service of the European Union (EU) together with EU, its Member States, and six Eastern European Partners governing its relationship with the post-Soviet states of Armenia, Azerbaijan, Belarus, Georgia, Moldova, and Ukraine. - NO WIRE SERVICE Photo: Thierry Monasse/dpa

13 May 2019, Belgium, Brussel: 13.05.2019, Belgium, Brussels: (From Left) Dutch Minister of Foreign Affairs Stef Blok is talking with the German Minister of Foreign Affairs Heiko Maas the Croatian Minister of Foreign & European Affairs Marija Pejcinovic Buric and the Austrian Minister of Foreign Affairs Karin Kneissl prior an EU Foreign Affairs Council and Eastern Partnership Ministerial meeting in the Europa building, the EU Council headquarter. The Eastern Partnership (EaP) is a joint initiative of the European External Action Service of the European Union (EU) together with EU, its Member States, and six Eastern European Partners governing its relationship with the post-Soviet states of Armenia, Azerbaijan, Belarus, Georgia, Moldova, and Ukraine. - NO WIRE SERVICE Photo: Thierry Monasse/dpa

13 May 2019, Belgium, Brussel: 13.05.2019, Belgium, Brussels: German Minister of Foreign Affairs Heiko Maas (L) is talking with the Croatian Minister of Foreign & European Affairs Marija Pejcinovic Buric (R) prior an EU Foreign Affairs Council and Eastern Partnership Ministerial meeting in the Europa building, the EU Council headquarter. The Eastern Partnership (EaP) is a joint initiative of the European External Action Service of the European Union (EU) together with EU, its Member States, and six Eastern European Partners governing its relationship with the post-Soviet states of Armenia, Azerbaijan, Belarus, Georgia, Moldova, and Ukraine. - NO WIRE SERVICE Photo: Thierry Monasse/dpa

13 May 2019, Belgium, Brussel: 13.05.2019, Belgium, Brussels: (From Left) Dutch Minister of Foreign Affairs Stef Blok is talking with the German Minister of Foreign Affairs Heiko Maas the Croatian Minister of Foreign & European Affairs Marija Pejcinovic Buric and the Austrian Minister of Foreign Affairs Karin Kneissl prior an EU Foreign Affairs Council and Eastern Partnership Ministerial meeting in the Europa building, the EU Council headquarter. The Eastern Partnership (EaP) is a joint initiative of the European External Action Service of the European Union (EU) together with EU, its Member States, and six Eastern European Partners governing its relationship with the post-Soviet states of Armenia, Azerbaijan, Belarus, Georgia, Moldova, and Ukraine. - NO WIRE SERVICE Photo: Thierry Monasse/dpa

13 May 2019, Belgium, Brussel: 13.05.2019, Belgium, Brussels: (From Left) Slovenian Minister of Foreign Affairs Miroslav Cerar is talking with the Swedish Minister of Foreign Affairs Margot Wallstroem the Dutch Minister of Foreign Affairs Stef Blok, the German Minister of Foreign Affairs Heiko Maas the Croatian Minister of Foreign & European Affairs Marija Pejcinovic Buric and the Austrian Minister of Foreign Affairs Karin Kneissl prior an EU Foreign Affairs Council and Eastern Partnership Ministerial meeting in the Europa building, the EU Council headquarter. The Eastern Partnership (EaP) is a joint initiative of the European External Action Service of the European Union (EU) together with EU, its Member States, and six Eastern European Partners governing its relationship with the post-Soviet states of Armenia, Azerbaijan, Belarus, Georgia, Moldova, and Ukraine. - NO WIRE SERVICE Photo: Thierry Monasse/dpa