A ransomware group has published what it claims are thousands of sensitive files linked to India’s largest nuclear power plant, raising concerns about cybersecurity and the protection of critical infrastructure.
The group, World Leaks, uploaded a large cache of documents to the dark web, alleging they originated from Reliance Group, a contractor involved in the Kudankulam Nuclear Power Plant in the southern state of Tamil Nadu.
In a statement to Reuters, Reliance Group, owned by businessman Anil Ambani, confirmed a “partial breach” of data stored on servers operated by third-party data centre provider Yotta. The company said the Indian government had been informed but did not specify what information had been compromised.
Reuters reviewed the leaked material, which is dated between 2016 and mid-2025, but said it could not independently verify its authenticity.
The files purportedly include facility blueprints, supplier information, inspection reports, meeting records, equipment reviews and insurance documents. Around 19,000 files appear to be among the most sensitive within a larger cache of approximately 858,000 documents posted online.
Nickolas Roth, a senior director at the Nuclear Threat Initiative, warned that if genuine, the leaked material could pose a serious security risk to the nuclear facility and highlights the growing cyber threats facing critical infrastructure.