A Russian missile strike targeting Kyiv killed at least one person shortly after a meeting between U.N. Secretary-General António Guterres and President Volodymyr Zelenskyy, who called the attack an attempt to “humiliate” the U.N.

Vira Hyrych, a journalist for the U.S.-funded Radio Free Europe, died in the attack, which hit her residential building, the broadcaster said Friday. Her body was found early Friday in the wreckage. In a separate incident, an American fighting in Ukraine was also killed, his family told media outlets Friday.

Ukraine’s emergency services said at least ten others were also injured in the strike, which targeted the residential high-rise and another building. Russia claimed it “destroyed production buildings” at a defense factory in Kyiv.

“This says a lot about Russia’s true attitude towards global institutions, about attempts of Russian authorities to humiliate the U.N. and everything that the organization represents,” Zelenskyy said in a video address to the nation. “Therefore, it requires corresponding powerful reaction.”

About an hour before, Guterres appeared with Zelenskyy at a news conference. The U.N. chief had been in Ukraine and Russia this week seeking humanitarian evacuations from the besieged port city of Mariupol, which the U.N. said Russia agreed to “in principle.” Guterres also toured some of the destruction in and around Kyiv.

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Latest developments:

►The U.N.’s human rights office said Friday 2,899 civilians have been killed in Ukraine since the start of the war. An additional 3,235 have been injured, the office said.

►Russian President Vladimir Putin and Ukrainian President Volodymyr Zelenskyy will both be in attendance at the G20 summit to be held in Bali in November, said Indonesian President Joko Widodo, who is hosting the event and spoke with both leaders this week.

►Tens of thousands of troops from NATO and other north Atlantic nations will take part in a series of military exercises across Europe in the coming weeks as western countries seek to deter Russian aggression.