Russian missiles have again hit Ukrainian cities but with less intensity than yesterday, when dozens of strikes killed 19 people, wounded more than 100 and knocked out power supplies across the country in Moscow's biggest aerial offensive since the start of its invasion on 24 February.
More missile strikes killed at least one person in the southeastern Ukrainian town of Zaporizhzhia and left part of the western city of Lviv without power, local officials said. Air raid sirens earlier wailed across Ukraine for a second day.
"When Ukraine receives a sufficient quantity of modern and effective air defence systems, the key element of Russia's terror, rocket strikes, will cease to work," Mr Zelensky told G7 leaders at a virtual meeting where he again ruled out peace talks with Russian President Vladimir Putin.
Ukraine today received the first of four IRIS-T air defence systems Germany promised to supply, a German defence ministry source said. Kyiv also expects to receive state-of-the-art US air defence systems.
Ukraine's Western allies have pumped aid and heavy weapons to Kyiv since Russia's invasion began.
Mr Zelensky's government has mixed gratitude with pleas for more powerful weapons and faster deliveries.
The G7 - which groups the United States, Germany, France, Japan, Britain, Italy and Canada - pledged continued "financial, humanitarian, military, diplomatic and legal support...for as long as it takes" to Ukraine, it said in a statement.
Moscow, which calls its actions in Ukraine a "special military operation" to eliminate dangerous nationalists andprotect Russian-speakers, has accused the West of escalating and prolonging the conflict by supporting Kyiv.
"We warn and hope that they realise the danger of uncontrolled escalation in Washington and other Western capitals," Russian Deputy Foreign Minister Sergei Ryabkov was quoted as saying by RIA news agency today.
Kyiv and the West accuse Russia of an unprovoked imperialist land grab in neighbouring Ukraine.
Belarus, Moscow's closest ally, said it had begun an exercise to assess its "combat readiness" after ordering troops on Monday to deploy with Russian forces near its border with Ukraine. Belarus allowed Russia to use its territory to invade Ukraine but has not sent its own troops across the border.
Mr Zelensky denied Minsk's claim that Ukraine planned to attack Belarus but told the G7 he wanted to make sure there was no threat from its northern neighbour, and he called for a mission of international observers to monitor the border area.
Belarus could face more Western sanctions if it gets more involved in Ukraine, French Foreign Minister Catherine Colonnatold French radio, adding that Russia had violated the rules ofwar with Monday's strikes on Ukrainian cities.
Mr Putin, under domestic pressure to ramp up the war as his forces have lost ground since early September, said he ordered the strikes as revenge for an explosion that damaged Russia's bridge to annexed Crimea last weekend.
Residents in the capital Kyiv took cover today for a second day deep in the underground metro, where trains were still running.
Viktoriya Moshkivski, 35, and her family were among hundreds of people in the Zoloti Vorota station, near a park where a missile ripped a crater next to a playground on Monday.
"(Putin) thinks that if he scares the population, he can ask for concessions, but he is not scaring us. He is pissing us off," she said as her sons, Timur, 5, and Rinat, 3, sat by her side on a sleeping bag.
In recent weeks, Moscow has annexed new tracts of Ukraine, mobilised hundreds of thousands of Russians to fight and repeatedly threatened to use nuclear arms, stoking alarm in the West.
A European diplomat said NATO was considering convening a virtual summit of the alliance to consider its response.
NATO has not noticed any change in Russia's nuclear posture following the threats, Secretary General Jens Stoltenberg told reporters in Brussels today.
It remains unclear who was behind explosions last month affecting gas pipelines under the Baltic Sea.
Moscow has denied any involvement and pointed the finger at the United States.
The alliance will proceed with its annual nuclear preparedness exercise "Steadfast Noon" next week - in which NATO air forces practise the use of US nuclear bombs based in Europe with training flights - without live weapons.
Russia said it continued to launch long-range air strikes on Ukraine's energy and military infrastructure on Tuesday.
Ukrainian Foreign Minister Dmytro Kuleba said the main targets were energy facilities in a campaign planned well inadvance and designed to make life unbearable for civilians.
"They've hit many yesterday and they hit the same and newones today," he wrote on Twitter. Hundreds of settlements around Kyiv, Lviv and elsewhere were still without power,Deputy Interior Minister Yevheniy Yenin said.
The governor of Russia's Belgorod region said that more than 2,000 people had been left without power after Ukraine shelled an electricity substation in the town ofShebekino, on the border with Ukraine's Kharkiv region.
Ukraine did not immediately comment on the incident.
