Ukraine has shown reporters fragments of the missile it says hit a key government building in Kyiv this weekend, identifying it as a Russian Iskander cruise missile.
Officials here now believe the building was struck deliberately in the early hours of Sunday morning.
Vladimir Putin's response to Donald Trump's peace efforts has been a clear escalation in Russian attacks.
In the eastern Donbas region, more than 20 civilians were killed by a Russian glide bomb on Tuesday as they queued to collect their pensions.
Volodymyr Zelensky condemned the strike on the village of Yarova as 'savage' and called once again on Ukraine's allies to increase the pressure on Moscow through sanctions.
His office said some US and European weapons components are still reaching Russia, including for the Iskander missile. Moscow has already substituted the rest with its own production.
Strong actions are needed to make Russia stop bringing death, Ukraine's president wrote.
Our team was filming on Sunday morning during the air raid on central Kyiv and captured the moment the cabinet of ministers was hit. The images appear to show a direct strike: a missile suddenly arcs downwards, right before the explosion.
There is no indication of it being intercepted by air defences. The missile, packed with more than 100kg (220lb) of explosives, did not detonate, so the damage is limited to three floors. But it's still significant.
In Kyiv, the increase in early morning attacks is obvious: they've grown more frequent - but most importantly they're bigger in scale. Russia now launches hundreds of drones at a time, deliberately draining Ukraine's resources.
That's why Zelensky is constantly calling for more missiles: to someone far from Kyiv it might sound like he's stuck on repeat. But for people here it might be the difference between life and death.
Russia's strikes are not only symbolic, on empty government buildings. They regularly hit people's homes, too, as we saw again this week.
Closer to the front line, the tactics are different: deadly glide bombs arrive almost without warning.
Ukraine's Foreign Minister Andrii Sybiha called it a barbaric strike by Russia and a heinous crime against the very people and region Putin claimed needed saving when he ordered the invasion.
