A Russian drone strike damaged a critical nuclear infrastructure facility in the Chornobyl exclusion zone in the early hours of Sunday, drawing sharp condemnation from Kyiv and the International Atomic Energy Agency (IAEA). The attack targeted the reception building of the Centralised Spent Nuclear Fuel Storage Facility (CSSF), a site designed for the long-term storage of spent fuel from Ukraine's nuclear power plants.

The strike and immediate aftermath

Ukrainian president Volodymyr Zelenskyy said a Shahed attack drone struck the facility at around 2 a.m. local time. State nuclear operator Energoatom reported that a fire broke out across an area of roughly 40 square metres and was subsequently extinguished. No personnel were injured. Crucially, Energoatom confirmed that no spent nuclear fuel containers were present in the building at the time of the attack, and radiation levels at the site remained within established limits.

“As of now, there is no heightening of radiation safety limits. But there is clearly a heightening of Russia's already sky-high arrogance.”

IAEA response and damage assessment

The IAEA, which was briefed by Ukraine, described the damage as significant, affecting the building's facade, windows, and doors. Neighbouring structures were also hit by the shock wave. IAEA Director General Rafael Mariano Grossi called the incident deeply concerning because it occurred at a facility containing large quantities of nuclear material stored just metres from the targeted building.

“Attacks on nuclear sites are absolutely unacceptable and in direct violation of the key principles of nuclear safety, in particular the seven indispensable pillars for nuclear safety during a military conflict.”

An IAEA team stationed at Chornobyl is preparing to visit the site to inspect the impact.

A pattern of nuclear risk

Sunday's strike is not the first time the Chornobyl zone has been hit. In February 2025, a Russian Shahed drone damaged the containment arch over the reactor destroyed in the 1986 disaster, an incident Moscow denied responsibility for. The Zaporizhzhia nuclear power plant in southern Ukraine, occupied by Russian forces, has also been a repeated flashpoint, with both sides trading accusations over attacks on the facility.

“This is not the first time Russian forces are putting Ukrainian nuclear facilities at risk. Russia's nuclear blackmail and threats to nuclear safety are systemic, deliberate, and unacceptable.”

Broader aerial campaign and diplomatic context

The Chornobyl strike occurred amid an intensifying battle of long-range aerial strikes. On Saturday, a Ukrainian drone attack targeted the historic naval town of Kronstadt near St. Petersburg as the city's economic forum was concluding. Russia's defence ministry claimed its air defences downed 500 Ukrainian drones in the preceding 24 hours. Meanwhile, Ukraine's air force reported that Russia launched 236 drones overnight, of which 215 were intercepted. Elsewhere in Ukraine, Russian strikes killed at least two civilians: a 56-year-old minibus driver in the Zaporizhzhia region and a 59-year-old man in the Dnipropetrovsk region.

The attack also serves as a backdrop to a summit in London on Sunday, where Zelenskyy is meeting UK Prime Minister Keir Starmer, French President Emmanuel Macron, and German Chancellor Friedrich Merz to discuss further pressure on Moscow over its four-year war.