Officials of the Independent National Electoral Commission (INEC) left a throng of party agents and reporters in dismay or surprise when the electoral body failed to keep its promise to commence collation tonight until the outcome of Nigeria's presidential election is known.

Reporters and collation agents for the nation's various political parties found INEC's Abuja collation center empty. The collation center is located at the Electoral Institute building.
Reporters who had waited anxiously to record the collation live from the center started leaving at 2:00 a.m. [Nigerian time] when INEC did not provide any results to them.

An INEC official also told collation agents of the parties that the exercise would not start tonight as expected. The agents were advised to return at 5:00 a.m. [Nigerian time].
http://saharareporters.com/news-page/inec-collation-center-empty-collation-agents-told-return-sunday-morning