Kyiv’s military administration said four people were killed and 23 wounded in the capital, including a child, after overnight attacks involving ballistic missiles and waves of Shahed drones.

Interior Minister Ihor Klymenko said five emergency responders were killed in Kharkiv after they were hit by a second strike while battling a fire caused by an earlier attack. At least five other rescuers were wounded.

Authorities said powerful explosions were reported across Kyiv overnight, with civilian infrastructure heavily damaged. Several strikes hit residential areas in the city’s Shevchenkivskyi district, including a 25-story apartment building, while a market and grocery store also caught fire.

A nine-story residential building in the Obolonskyi district was also damaged after being directly hit.

Kyiv officials accused Russia of deliberately targeting civilian areas, while Moscow has continued to carry out long-range missile and drone attacks during the ongoing war.

The strikes also caused major damage at the Kyiv-Pechersk Lavra, a UNESCO World Heritage site and one of Ukraine’s most important religious landmarks.

Officials said a major fire broke out at the historic monastic complex, while Metropolitan Epiphanius, head of the Orthodox Church of Ukraine, said the roof of the Dormition Cathedral was damaged.

The Kyiv-Pechersk Lavra, also known as the Monastery of the Caves, dates back to the 11th century and includes churches, monasteries and underground caves. It has long been considered a major religious and cultural center in Eastern Europe.

The latest attacks came as Russia and Ukraine remain locked in a war that has entered its fifth year, with Moscow continuing strikes against Ukrainian cities and infrastructure.

The sanctions target what U.S. officials described as a procurement network supporting Iran’s defense sector amid continuing regional tensions and stalled diplomatic efforts tied to the conflict involving Tehran and its regional allies.

The Treasury Department said the measures were aimed at entities and individuals allegedly involved in facilitating the acquisition of sensitive materials and technology for Iran’s military-industrial apparatus, including components linked to the production of Shahed unmanned aerial vehicles.

The action comes days before U.S. President Donald Trump is expected to travel to China for talks with Chinese President Xi Jinping, at a time when negotiations tied to the broader Iran conflict have shown little progress.

“Under Trump’s decisive leadership, we will continue to act to Keep America Safe and target foreign individuals and companies providing Iran’s military with weapons for use against U.S. forces,” Treasury Secretary Scott Bessent said in a statement.

The Treasury did not immediately disclose the full list of sanctioned parties in the initial announcement, but said several of the targeted entities operated from China and Hong Kong and were involved in supplying materials tied to Iran’s drone manufacturing capabilities.

Iran’s Shahed drones have become a central component of the country’s military strategy and have drawn international scrutiny over their deployment across regional conflicts. Western governments have repeatedly accused Tehran of expanding its drone production and export networks despite existing sanctions regimes.

The latest measures freeze any U.S.-based assets belonging to the designated parties and generally prohibit Americans from conducting business with them. Secondary sanctions risks may also apply to foreign financial institutions engaging with sanctioned entities.

Washington has steadily expanded sanctions targeting Iran’s defense procurement channels since the outbreak of heightened regional hostilities, focusing increasingly on overseas intermediaries and companies accused of supplying dual-use technology and industrial materials.

Ukrainian President Volodymyr Zelensky used the anniversary to accuse Moscow of endangering global nuclear safety, saying repeated Russian drone operations near the Chernobyl nuclear power plant risked triggering another man-made catastrophe.

“Russia is once again bringing the world to the brink of a man-made disaster,” Zelensky wrote on social media, referring to Iranian-designed Shahed drones used extensively by Russian forces since the full-scale invasion began in February 2022.

He said such drones had repeatedly flown over the plant and that one had struck the protective confinement structure last year, calling for stronger international pressure to halt what he described as “nuclear terrorism.”Russian missile and drone strikes on the southeastern Ukrainian city of Dnipro killed at least nine people, regional officials said, making it the deadliest single attack reported during the latest wave of cross-border strikes.

In Russian-occupied Crimea, Moscow-installed authorities said one man was killed in a Ukrainian drone strike on the port city of Sevastopol. Russia annexed Crimea from Ukraine in 2014, a move widely rejected by the international community, and has since used the peninsula as a key military logistics hub.

In eastern Ukraine’s occupied Luhansk region, Leonid Pasechnik, the Russia-backed governor, said three people were killed in an overnight Ukrainian drone strike on a village, after earlier reporting two deaths on Saturday.Earlier, authorities in Russia’s Belgorod border region said a woman was killed in a Ukrainian drone attack.

Ukraine did not publicly comment on the strikes in Crimea or Luhansk, and the claims could not be independently verified.Ukraine’s military said it had also struck an oil refinery in Yaroslavl, deep inside Russian territory, triggering fires at a facility that processes around 15 million tons of oil annually and produces gasoline, diesel and jet fuel, including supplies for the Russian military.Russia did not immediately comment on the refinery attack.

Kyiv has increasingly used domestically developed long-range drones capable of reaching targets up to 1,500 km (900 miles) inside Russia, targeting energy infrastructure and military logistics sites.Ukrainian officials argue such strikes are aimed at reducing Russian military capacity, particularly as Moscow seeks to increase oil exports after the Trump administration granted temporary sanctions waivers to ease global supply constraints.

The anniversary of the 1986 Chernobyl disaster also renewed focus on the safety of the damaged reactor site.Rafael Grossi, director general of the International Atomic Energy Agency, said repairs to the plant’s outer protective shell must begin urgently after damage from a strike last year compromised a key safety function of the structure.

He warned that prolonged delays could increase risks to the original sarcophagus covering Reactor No. 4, the site of the world’s worst nuclear disaster.The European Bank for Reconstruction and Development estimated repairs would require at least 500 million euros ($586 million).

Ukraine’s Energy Minister Denys Shmyhal said international partners had so far committed 100 million euros in additional funding, on top of a previously agreed 30 million euros.Ukrainian officials say a Russian drone struck the outer shell of the New Safe Confinement structure in February 2025.

The $2.1 billion steel arch, completed in 2019, was built to contain radioactive material over the destroyed reactor.Moscow denied responsibility and accused Kyiv of staging the incident.Separately, Russia’s Defense Minister Andrei Belousov visited North Korea on Sunday for talks with leader Kim Jong Un, where both sides discussed expanding military cooperation.

Belousov said the two countries had agreed to move military ties to a “sustainable, long-term basis,” according to Russian state news agency RIA Novosti.During the visit, he awarded Russia’s Order of Courage to North Korean troops who served in Russia’s Kursk region, where Ukrainian forces launched a surprise incursion in August 2024.

Kim has supplied thousands of troops and significant weapons shipments to support Russia’s war effort.