Kenya will hold a controversial repeat presidential election on Thursday as planned, the head of the election commission has announced.

Uhuru Kenyatta, who is seeking a second term, won in August but the poll is being held again over irregularities.

Opposition candidate Raila Odinga has called on his supporters to join him in boycotting the ballot.

A bid to delay the election fell apart after only two out of seven Supreme Court judges showed up for a hearing.