The Office of the National Security Adviser (ONSA) has hit back at Mallam Nasir el-Rufai, not only denying the allegation procuring 10 kilograms of Thallium Sulphate from Poland, but asking him to supply any evidence he has to the Department of State Security (DSS) for a thorough investigation.
The letter written by Brig-Gen. O. M. Adesuyi, on behalf of the NSA, reads: “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).
“The correspondence further indicated that information concerning the purported procurement is reportedly available to the political opposition leadership.
“In this regard, I am directed to respectfully convey that ONSA has neither procured nor initiated any process for the purchase of such material, and has no intention of doing so.
“However, I am further directed to state that the allegation has been formally referred to the Department of State Services for a comprehensive investigation.
“Your Excellency and other parties involved, who may possess relevant information relating to this claim will be duly invited by the Service to provide any evidence that may assist in an in-depth investigation, establishing the facts and ensuring due diligence.
“Please accept the assurances of the esteemed regards of the National Security Adviser.”
El-Rufai is yet to publicly react to the development, but the Cable online noted that the letter, which was initially rejected, was eventually delivered on Sunday.
A security aide of the former governor was said to have received it on his behalf. (Cable online)
