Nasir Ahmad El-Rufai, the former Governor of Kaduna State, has accused the Office of the National Security Adviser (ONSA), headed by Nuhu Ribadu, of procuring thallium sulphate—a highly toxic substance—from Poland.
In a post shared via his official X account on Sunday, El-Rufai revealed he has formally petitioned the NSA for a detailed explanation regarding the alleged transaction.
El-Rufai emphasized that thallium compounds are exceptionally dangerous and governed by strict international regulations.
He argued that the reported importation lacks transparency and poses a significant risk to public safety.
“As part of my duty as a citizen, I wrote to the NSA to seek clarification on reports about the importation by his office of thallium sulphate, a very dangerous toxin.
” It’s a matter of concern if anyone brings in any poison, more so an odourless, colourless one,” El-Rufai wrote on X.
He also sought to know whether relevant regulatory and public-health authorities, including the National Agency for Food and Drug Administration and Control and the Nigeria Centre for Disease Control, were involved in assessing potential risks or developing safety and mitigation plans.
“I am writing as a concerned citizen to seek clarification and reassurance regarding information available to the political opposition leadership about a procurement of approximately 10 kilograms of Thallium Sulphate by the Office of the National Security Adviser (ONSA), reportedly from a supplier in Poland,” the letter read.

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