The Media and Publicity Secretary of IPOB, Emma Powerful, issued the warning in a statement on Friday.
Powerful said: “Nigeria Government and her security agency, the Department of State Services, must allow our leader Mazi Nnamdi Kanu’s lawyers and family access to him in the dungeon of DSS secret cell, it is now confirmed that their real intention in kidnapping him and bundling him back to Nigeria is to kill him.
“The mission they could not actualise in September 14, 2017 when soldiers invaded his Afaraukwu home during Operation Python Dance is what they want to actualise now.
“We demand that DSS should allow him access to his lawyers and family members for this is his lawful right. And his lawyers are being harassed and we pity them and Nigeria if anything happen to our leader Mazi Nnamdi Kanu the Nigeria Government and security agencies must understand the product we are made of and how prepared we are.
“South East Governors and Ohaneze including politicians in the region must ensure that nothing bad happen to Nnamdi Kanu because Miyetti Allah and sympathisers of terrorists are going free in the country but ordinary person and innocent citizens are being molest everyday because they are Biafrans. We won’t accept that.
“We also want to tell the DSS to jettison any plans to inject our leader with poisonous vaccine that will make him die slowly. Any such attempt will come with unimaginable consequences! Nnamdi Kanu must not die in custody.
“The Fulani- controlled federal government of Nigeria and DSS should release our leader for international medical check up. He must have access to his doctors to ascertain his current health status since he was abducted and tortured by the security agents.
“We declare without equivocations that the Nigeria Government should not take our calmness for granted. Should anything untoward happen to our leader while in detention or even after, we will totally cripple Nigeria and its Government.
“Our intelligence units are following up events including the torture being meted out to him since his abduction. The world should see how the wicked Nigeria Government is provoking us.
“While Boko Haram terrorists and bandits maiming and killing indigenous Nigerians in their ancestral lands are made to go free, and even the few captured ones are released and given cash after sumptuous treatment in detention, an innocent freedom fighter is made to languish in detention.”