Leader of the Indigenous People of Biafra Nnamdi Kanu was arrested in Kenya, his brother has said.
A message to PUNCH on Wednesday by IPOB spokesman Emma Powerful quoted Kingsley as making the revelation.
Several reports had claimed he was arrested in Ethiopia.
Kingsley said in the message that his brother was visiting Kenya when he was intercepted, detained and handed over to Nigerian authorities who then flew him to Nigeria.
Kenya President Uhuru Kenyatta visited Nigeria in 2014. He deleted his personal Twitter account last year over insults.
Reacting further on Kanu’s re-arrest, Kingsley said, “My brother has been subject to extraordinary rendition by Kenya and Nigeria. They have violated the most basic principles of the rule of law.
“Extraordinary rendition is one of the most serious crimes states can commit. Both Nigeria and Kenya must be held to account. I demand justice for my brother, Nnamdi Kanu.”
Kingsley called on the British government to get involved, considering Kanu is also a British citizen.
He added that British “foreign secretary Dominic Raab must make clear to the Nigerian authorities that they will not tolerate the unlawful detention of British citizens.”