The IMPI chairman said it would seem that some individuals and groups were laying the groundwork for insurrection under the cover of a peaceful protest.
The government said it was ready to enter discussions with the protesters.
One in four of those countries are in West Africa: Burkina Faso, Mali, Niger and Nigeria.
The INEC boss said the commission was compelled to review the final list of candidates after it was already published.
Several hundred people gathered for a pro-Palestinian demonstration in Vienna on Wednesday despite a ban to stop it.
At least 12 people were burned alive as their shelters were set ablaze during the attack.
Mr Obi said the latest massacres in Nigeria “are very depressing and extremely worrisome.”
“I just want to give a brief update on what has happened today in the case of the rerun election.
Mr Rhodes-Vivour said he also visited families of those killed during the election, accusing the ruling All Progressives Congress of unleashing violence on voters.
A woman said she and her husband, his siblings, their children, including an 11-month-old baby, were assaulted and illegally detained by officers of the Igando division.
