Monday, February 16 2026 -The Office of the National Security Adviser, ONSA, has dared former Governor of Kaduna State, Nasir El-Rufai to submit evidence of the alleged procurement of thallium sulphate to the Department of State Services, DSS, for further investigation.
Thallium sulphate is a highly toxic, colourless and
odourless compound that can kill humans in small doses.
El-Rufai had said the substance was reportedly sourced from
a supplier in Poland.
Recall that El-Rufai had accused the ONSA, under Nuhu Ribadu
of procuring thallium sulphate, a highly toxic chemical compound, and has
demanded urgent clarification over the alleged transaction.
Responding, the ONSA denied the allegation, asking El-Rufai
to supply any evidence he has to the DSS for a thorough investigation.
According to TheCable, a copy of the response sent to
El-Rufai’s Abuja address was rejected by the security operatives on duty.
The security operatives reportedly told the dispatch clerk
that the head security was not on the ground and that they did not have an idea
of when El-Rufai would visit.
Meanwhile, it was eventually delivered on Sunday and the
head of security signed and received it on behalf of el-Rufai.
The response, written by Brigadier-General, OM Adesuyi, on
behalf of the NSA was reportedly dated February 13, 2026.
Adesuyi wrote: “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.”
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