The unity of the world's most populous black nation appears to be facing its toughest test since the civil war ended in 1970.

The agitation by the south-eastern part of Nigeria to divorce from the Nigerian union is no longer discussed in whispers.

Few days after Ndigbo made the political statement of staying at home for a whole day to mark 50 years of Biafra, a group of youths in the northern part of the country gave Ndigbo in the zone 90 days to leave or face dire consequences.

Many people, including prominent Nigerians have condemned the ultimatum.

But in an unexpected twist, some elders in the zone have publicly declared their support for the ultimatum.

But as the 8th National Assembly marked its second anniversary, the President of the Senate Dr. Bukola Saraki has said that the unity of Nigeria is not negotiable.

“The senate must stand clearly to defend one Nigeria. There is no room for division and we must live by example. The next two years will be more challenging but we must stand together,” Saraki said.

'Which way Nigeria?'