Ukrainian president Volodymyr Zelensky has said Ukraine has decided where it will retaliate after a Russian drone struck the headquarters of the Security Service of Ukraine (SBU) in central Kyiv.

“The geography of our response has been determined. The timing will be chosen to ensure results,” Zelensky said in a post on Telegram on Friday after meeting acting SBU head Oleksandr Poklad, according to Ukrainska Pravda.

Zelensky had earlier instructed Poklad to prepare an “appropriate, tangible response” and, where possible, one that “mirrors this strike”. The SBU said the damaged headquarters would be repaired and warned that Russia would receive a “painful response”, including more special operations and attacks on Russian targets.

The Russian drone hit Poklad’s office in the SBU headquarters on Friday, although the acting SBU chief was not there at the time. At least 12 people were injured in the attack, according to Kyiv authorities.

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Russia killed four people in an overnight attack on the city of Kamianske in Ukraine’s Dnipropetrovsk Oblast, hours after Kyiv proposed a temporary ceasefire during US-led peace talks.

Regional governor Oleksandr Hanzha said Russian forces used missiles, drones, and artillery in attacks across the region overnight and into Saturday morning.

Five people were also injured, with three taken to hospital, including a 30-year-old woman in intensive care, the Kyiv Independent reported.

An industrial facility was hit in Kamianske, although Hanzha did not give details of the target. Ukraine’s Air Force had earlier warned that Russian ballistic missiles were heading towards the city.

The attack came hours after Ukraine ordered its forces to observe a temporary ceasefire to coincide with US envoys Steve Witkoff and Jared Kushner’s visits to Moscow and Kyiv.

US president Donald Trump’s envoys Steve Witkoff and Jared Kushner are expected to meet Russian president Vladimir Putin in Moscow on Saturday before travelling to Kyiv for talks with Zelensky on Sunday.

The pair will meet Putin at the Kremlin before their planned Kyiv visit, reported Axios, citing US officials. The trip would be their first to Ukraine since Trump returned to office.

The visit comes after months of stalled US-mediated negotiations, as talks between Russia and Ukraine were paused in February after the Iran war began, while Putin has rejected several proposals for a three-way summit with Trump and Zelensky.

Zelensky confirmed the planned meetings, saying: “It is important that America remain actively engaged. We are ready to meet with them in Ukraine – properly and substantively.”

Russia has continued to insist on territorial concessions from Ukraine. Kremlin spokesman Dmitry Peskov has described Moscow’s position on territory and NATO membership as “unshakeable”.

Ukraine’s security service headquarters was set alight after a Russian drone struck it ahead of diplomatic talks with US officials on ending the war.

Smoke could be seen above the SBU headquarters in Kyiv on Friday after a drone targeted the office of the acting head of the security service, Oleksandr Poklad, who was unscathed following the attack.

A World Health Organization warehouse storing humanitarian medical supplies was destroyed in an air attack in Kyiv Oblast early on Thursday, with the UN agency warning of a growing pattern of attacks on facilities supporting Ukraine’s healthcare system.

“Access to the site remains restricted due to heavy smoke and safety concerns, while assessments of possible damage and stock losses are ongoing. No WHO personnel were affected,” WHO spokesperson Christian Lindmeier told Reuters.

The WHO said the strike was the third attack affecting one of its warehouses in Ukraine in three months. A warehouse in Dnipro was destroyed in August, destroying half the medical supplies and equipment intended for about 225,000 people in frontline and hard-to-reach areas.

According to the WHO, at least 20 attacks have affected humanitarian-supply warehouses across Ukraine this year, including 15 involving facilities storing health-related supplies.

Air Tanzania briefly suspended its Dar es Salaam-Moscow service on Friday, citing safety concerns amid a surge in Ukrainian drone attacks on Russia.

The airline said the decision, which had been due to affect flights from Friday, followed “a routine risk assessment of the operating environment along the route”. This came after an Air Tanzania flight from Zanzibar to Moscow was diverted to St Petersburg on 3 September because of an airspace closure around Moscow.

However, the airline reversed the suspension within hours, saying flights would resume on 7 September.