The Office of the National Security Adviser has denied allegations by former Kaduna State governor Nasir El-Rufai that it procured 10 kilograms of Thallium Sulphate, asking him to provide evidence to security authorities.
The Office of the National Security Adviser (ONSA) has responded to Nasir El-Rufai, former governor of Kaduna State, over his request for clarification on the alleged importation of a toxic substance from Poland. In a letter addressed to Nuhu Ribadu, the National Security Adviser, El-Rufai claimed that information available to opposition leaders indicated that approximately 10 kilograms of Thallium Sulphate had been procured by ONSA. ”Given that thallium salts are highly toxic and tightly controlled substances, I believe it is important for public safety, democratic accountability and for maintaining public trust to confirm the following details:” he wrote, listing concerns including the supplier’s identity, import permits, quantity and concentration, storage and security arrangements, regulatory oversight involving NAFDAC and NCDC, as well as public-health risk assessments and hazard-mitigation plans. ”I want to stress that this inquiry is made in good faith, solely to ensure that due processes, safety standards, and transparency are observed. Public confidence in the integrity of national institutions is strengthened when potential risks are openly addressed and managed.”
In a response published by TheCable on Sunday night, ONSA denied the allegation and called on El-Rufai to forward any evidence in his possession to the Department of State Services for investigation. The letter, signed by Brigadier-General OM Adesuyi on behalf of the NSA, stated: “I have the honour to present the compliments of the National Security Adviser and to acknowledge receipt of Your Excellency’s correspondence received on 11 February 2026 requesting clarification regarding the alleged procurement of approximately 10 kilograms of Thallium Sulphate by the Office of the National Security Adviser (ONSA).”
ONSA maintained that no such procurement had been undertaken by the office and reiterated its commitment to transparency and national security, urging that any credible information be submitted to appropriate security agencies for thorough examination.
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