After millions of Nigerians, including the president and his main opponent, traveled to their home towns to vote in presidential and parliamentary elections, the electoral commission announced a week’s delay, less than six hours before the balloting was due to start.

After reviewing its plans for the vote, the Independent National Electoral Commission decided “that proceeding with the election as scheduled is no longer feasible,” Chairman Mahmood Yakubu told reporters early Saturday in Abuja, the capital.