Firefighters try to extinguish a fire at a partially destroyed warehouse after a Russian drone attack in Brovary on the outskirts of Kyiv, Ukraine, Friday, Sept. 4, 2026. (AP Photo/Francisco Seco)

Kyiv:A Russian drone hit the headquarters of Ukraine's SBU security service ​in Kyiv on Friday, one of the most high-profile targets struck during the war as Russia intensified its campaign of air strikes against ‌Ukraine.

Ukraine said the attack was a major escalation of the war and President Volodymyr Zelenskiy vowed to retaliate, as Moscow's air strikes on the Ukrainian capital extended into a 10th day.

Heavy black smoke rose in Kyiv's historic city centre following the attack, which the city's mayor said had wounded at least 12 people.

During more than four-and-a-half years of war with Russia, Ukrainian government buildings have rarely been ​damaged in drone and missile strikes.

"The drone was aimed directly at the office of the Head of the Security Service in that building," Zelenskiy said on ​the Telegram app.

He said that he ordered "an appropriate, tangible response and, where possible, one that mirrors this strike."

"(SBU) Head Oleksandr Poklad ⁠reported on preparations for our active response to the Russian strikes," Zelenskiy said, posting a picture of their meeting in his office in Kyiv.

"The geography of our response ​has been determined."

The SBU is vital to Ukraine's war efforts as it carries out high-impact, deep strikes inside Russia designed to damage Moscow's war machine and its energy infrastructure.

The vast security ​agency was responsible for ambitious operations against Russia, such as the 2022 bombing of a Russian bridge to occupied Crimea and a 2025 drone attack, codenamed Spiderweb, that struck Russian strategic bombers.

It is also seen as a leading player in a campaign of covert assassinations of senior Russian military and other figures blamed by Ukraine for carrying out war crimes. Russia has denounced those killings as ​terrorist attacks.

IMPACT ON DIPLOMATIC EFFORTS

The strike on the SBU came as U.S. negotiators Steve Witkoff and Jared Kushner were expected to visit Moscow and Kyiv over the coming ​two days.

THE WALLS ​SHOOK

Numerous ambulances and emergency services were ⁠at the scene of Friday's strike in the historic part of the city close to the Saint Sophia Cathedral, a UNESCO World Heritage site.

"Four hundred metres (yards) from our office. The walls shook. The blast wave reached us very clearly," Iryna Borovets, a deputy ​director at the European Policy Institute, said in a post on X.

"It is a strike both against an institution that ​defends the country and against ⁠the ordinary urban space, and the protected historical heart of the city — that we are still trying to preserve."

The blast smashed windows at one of the buildings, which is part of the historic St Sophia complex, officials said.

The owner of a popular bakery, Zavertailo, said on the Telegram app that their building, located opposite the SBU building, was also damaged ⁠in the attack. ​He posted pictures of shattered glass covering tables and the floor.

Ukraine's capital has been under continuous Russian ​drone attack for 10 days.

"I think (people) can get used to this. In the centre of Kyiv, and in the centre of Moscow. It will get worse, I believe this," said Kyiv resident Oleh, 33, who declined ​to give his last name.



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