Ukrainian President Volodymyr Zelenskyy arrived at NATO Secretary General Mark Rutte's residence in Brussels on Monday to discuss efforts to end Russia's war in Ukraine.

European Council President Antonio Costa and European Commission President Ursula von der Leyen also joined the meeting.

Earlier in the day, Zelenskyy met with French, German and British leaders in London.

Monday's talks aim to strengthen Ukraine's position in negotiations on a U.S.-backed plan to end the war.

Zelenskyy earlier said discussions were to focus on security, air defense and long-term funding.

A major issue in the talks is the proposal for Ukraine to cede control of the Donbas region in eastern Ukraine to Russia, which Kyiv and its allies oppose.

Russia continued attacking Ukraine amid the diplomatic efforts.

Its drones struck high-rise apartments in the northeastern Ukrainian city of Okhtyrka overnight, injuring seven people and extensively damaging the building, according to the head of the regional administration, Oleh Hryhorov.

In the northern city of Chernihiv, a Russian drone exploded outside a residential building, injuring three people and damaging a kindergarten, gas lines and cars, regional head Viacheslav Chaus said.

Ukraine’s air force said Russia fired 149 drones overnight, with 131 neutralized and 16 others striking their targets.

Meanwhile, Russian air defenses destroyed 67 Ukrainian drones overnight, Russia’s Defense Ministry said. The drones were shot down over 11 Russian regions, it said.