INEC Chairman, Prof. Mahmood Yakubu

Nigeria's President, Muhammadu Buhari says last Saturday's shifted elections will be probed after the exercise this weekend.

President Buhari at a caucus meeting of the ruling All Progressives Congress Party in the country's capital, Abuja on Monday said all logistics were given to the country's Independent National Electoral Commission for successful polls.

"We cannot understand this inefficiency," he said.

Buhari said his government will "find out" what led to the postponement of the exercise "after the elections".