Abuja: Mr Onumah, a journalist and author, was arrested at the Nnamdi Azikiwe International Abuja airport on Sunday evening.
The journalist returned to Nigeria from Spain where he recently bagged a doctorate in communication studies.
He arrived via a Lufthansa airline and was waiting for his luggage at about 5:00 p.m. when SSS officials accosted him, the associate who was at the airport to receive Mr Onumah told PREMIUM TIMES.
It is believed that Mr Onumah, at about 5:00 p.m., was taken to the SSS headquarters in Abuja.
Mr Onumah, author of We Are All Biafrans, is a regular columnist and is an editorial board member of PREMIUM TIMES.
He has, using his writings and his civic whistleblowers’ network, called for good governance and anti-corruption in Nigeria. He is also an advocate for the restructuring of the Nigerian federation.
The SSS is yet to give any reason for Mr Onumah’s arrest.
Efforts to reach the SSS spokesperson, Peter Afunanya, were not successful on Sunday evening. He did not pick calls to his phone.