European Commission President Ursula von der Leyen has arrived in Kyiv for talks with Ukrainian President Volodymyr Zelensky.
Mr Zelensky is set to give a speech at the European Parliament and attend a summit with the EU’s 27 leaders as a guest.
EU denounced the “falsified outcomes of illegal’’ referendums Russia held in occupied territories in Ukraine.
The EU leaders’ chairman, European Council President Charles Michel, said the bloc would not be scared away from supporting Ukraine.
Top EU officials will be in Tokyo on Thursday to meet Prime Minister Fumio Kishida, in hopes of deepening ties with Japan, a strategic ally and neighbour to both Russia and China.
Secretary General of the military alliance, Jens Stoltenberg, said “NATO is not seeking a war with Russia.”