U.S. President Donald Trump has voiced frustration with Russian President Vladimir Putin over the intensification of attacks.

Flattery and pressure — coupled with President Trump’s growing dissatisfaction with President Vladimir V. Putin — have helped build momentum for new economic punishments.

Hundreds of Russian drones and more than a dozen missiles rained down on the Ukrainian capital early on Thursday, killing two people in a second massive air strike on Ukraine in two days as Kyiv seeks critical aid from its partners at a meeting in Rome.

Russia launched its largest drone and missile bombardment of Ukraine overnight into Wednesday, according to Ukrainian President Volodymyr Zelenskyy.

Russia launched an intense aerial assault on Ukraine’s capital Kyiv in the early hours of Thursday, marking a second consecutive night of ferocious attacks on the country, as Russia ramps up its bombardment more than three years into the war.