Russia fired its biggest-ever aerial barrage at Ukraine early Sunday, killing four people and setting government offices in Kyiv ablaze, an attack President Volodymyr Zelensky warned would prolong the war.

Flames could be seen rising from the roof of the sprawling government complex that houses Ukraine's cabinet of ministers in the heart of the city -- the first time it has been hit during the three-and-a-half-year conflict.

Drone strikes also damaged several high-rise buildings in the Ukrainian capital, according to emergency services.

Russia has shown no sign of halting its onslaught despite efforts by the United States to broker a peace deal, and Kyiv residents have become hardened to the daily rhythm of strikes and alerts.

"This is already routine for us, unfortunately," Olga, a 30

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