UN head condemns Russian attack on civilians during Ukraine visit

Ukrainian authorities also reported intense Russian fire in the Donbas and near Kharkiv, which is seen as key to the offensive

The head of the United Nations said Ukraine has become “an epicenter of unbearable heartache and pain" - a description underscored a short time later by the first Russian strike on the capital since Moscow's forces retreated weeks ago.

Russia pounded targets all over Ukraine on Thursday, including the attack on Kyiv that struck a residential high-rise and another building and wounded 10 people, including at least one who lost a leg, according to Ukraine's emergency services.

The bombardment came barely an hour after Ukrainian President Volodymyr Zelenskyy held a news conference with U.N. Secretary-General Antonio Guterres, who toured some of the destruction in and around Kyiv and condemned the attacks on civilians.

Meanwhile, explosions were reported across the country, in Polonne in the west, Chernihiv near the border with Belarus, and Fastiv, a large railway hub southwest of the capital. The mayor of Odesa, in southern Ukraine, said rockets were intercepted by air defenses.

Ukrainian authorities also reported intense Russian fire in the Donbas - the eastern industrial heartland that the Kremlin says is its main objective - and near Kharkiv, a northeastern city outside the Donbas that is seen as key to the offensive.

In the ruined southern port city of Mariupol, Ukrainian fighters holed up in the steel plant that represents the last pocket of resistance said concentrated bombing overnight killed and wounded more people. And authorities warned that a lack of safe drinking water inside the city could lead to outbreaks of deadly diseases such as cholera and dysentery.

In Zaporizhzhia, a crucial way station for tens of thousands of Ukrainians fleeing Mariupol, an 11-year-old boy was among at least three people wounded in a rocket attack that authorities said was the first to hit a residential area in the southern city since the war began. Shards of glass cut the boy's leg to the bone.