The EU must “unite in urging all parties to exercise the utmost restraint, respect international law, and avoid action that may increase tensions.’’
Russian attack on Kyiv happened hours before EU leaders gathered in Brussels to discuss their further response to the conflict.
The protesters complained about taxes, rising costs, and cheap imports and asked EU leaders to do more help.
Council president Charles Michel said the EU stands “in full solidarity with” Israel, who “has the right to defend itself in full compliance with international law”.
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.”