Chernobyl drone attacks are ‘really gambling with the safety of millions of people’, United Nations Development Programme (UNDP) administrator Alexander De Croo warned on Thursday, following a visit to the Chernobyl Nuclear Power Station where he inspected damage firsthand. His warning comes after the International Atomic Energy Agency (IAEA) GOV/2025/11 report concluded that the New Safe Confinement (NSC) enclosing Unit 4 can no longer perform its primary safety function of containing radioactive material from the 1986 explosion.
‘Whether it was a deliberate attack or an accident, this is something which is unacceptable,’ De Croo said. ‘Making sure that drones are not flying above that site is one way of avoiding that things like this could happen.’ He called for urgent international action, stressing that Russia had not been acting in line with international humanitarian law and that ‘even in war, there are rules to be followed.’
The Escalating Pattern of Chernobyl Drone Attacks
The IAEA’s assessment, prepared following a comprehensive safety review requested by Ukraine’s State Nuclear Regulatory Inspectorate (SNRIU), found that a drone strike on 14 February 2025 struck the upper part of the NSC arch, causing fire and structural damage. According to the American Nuclear Society, the strike left a hole larger than 500 square feet in the outer cladding, with efforts continuing to extinguish isolated smouldering areas of the structure’s insulation material.
The pattern of incursions has continued into 2026. According to the IAEA’s GOV/2026/7 report, three drones were detected within five kilometres of the site on 20 January 2026, causing the loss of four off-site power lines for the day; two further drones were detected within five kilometres on 5 February; and eight drones were detected within the monitoring area across 13 and 14 February. On 7 June 2026, a Russian drone struck a building storing spent nuclear fuel near Chornobyl, according to NucNet. Ukraine’s Energoatom stated: ‘The strike on a nuclear infrastructure facility has once again shown the world the true face of the Kremlin regime, which deliberately poses threats to nuclear and radiation safety.’
The IAEA has maintained a continuous support and assistance mission at the Chornobyl site since January 2023, deploying additional staff in 2025 to conduct its safety assessment of the damaged NSC, as confirmed in IAEA Director General Update 330. Temporary repairs to restore a degree of confinement function are under way in 2026, with support from the European Bank for Reconstruction and Development (EBRD), according to IAEA Director General Update 331. Full restoration remains contingent on the end of the conflict.
The Chernobyl site’s history makes the current position acutely serious. The 1986 disaster, classified as a level 7 nuclear event, occurred after a reactor went out of control during a poorly managed routine safety test, killing 31 people directly. The IAEA projected that radiation released could lead to around 4,000 cancer-related deaths among those within the affected radius, and between 1991 and 2005 documented at least 5,000 cases of thyroid cancer in children under 14 in Belarus and Ukraine, linked to severe radiation exposure.
Civilian Casualties and the Scale of Reconstruction
De Croo also addressed the broader humanitarian picture, telling reporters that ‘the intensity of the attacks really show that the frontline has moved beyond the Eastern part of the country, and today, the front line is everywhere.’ The UNDP and associated organisations are working to provide 6.6 million Ukrainians with electricity, though De Croo conceded that ‘it is clear that at this moment this is never enough, and Ukraine is heading into a very difficult winter.’
The human cost of the conflict reached a recorded peak in July 2026. The UN Human Rights Monitoring Mission in Ukraine recorded 437 civilians killed and 2,610 injured that month, a 30% increase in casualties compared with June 2026. Child casualties (17 killed; 166 injured) reached their highest level since April 2022. Kyiv was the hardest-hit city, with 54 civilians killed. Long-range weapons including missiles and drones accounted for 38% of total casualties, while aerial bombardment casualties rose by 143% compared with June. Across the first seven months of 2026, the Mission verified 12,477 civilian casualties (1,839 killed and 10,638 injured), according to the United Nations in Ukraine, a 44% increase on the same period in 2025.
The financial scale of the destruction is equally stark. The UNDP’s RDNA4 assessment, covering damage through 31 December 2024, puts reconstruction and recovery needs over the next decade at $524 billion, according to the UNDP Ukraine press release. The World Bank’s more recent RDNA5 report, covering impacts through 31 December 2025, raises that figure to $587.7 billion in recovery and reconstruction needs, with direct damage alone reaching $195.1 billion. The snippet’s figure of $600 billion is higher than both; the difference likely reflects scope or timing variations between assessments.
With the NSC unable to contain radioactive material and drone incursions continuing, the IAEA’s next reporting cycle and any Security Council response to De Croo’s intervention will indicate whether international pressure translates into enforceable restrictions on airspace above the site.
