Two presidential candidates from Central African Republic say they will support incumbent President Francois Bozize in a run-off election in May.

Candidates Francois Massis and Jean-Paul Ngoupande say they will  ensure a final victory for the former general.  Mr. Bozize fell short of the majority he needed to win the presidency in the first-round of voting in March.

Mr. Bozize now faces a run off with former Prime Minister Martin Ziguele, who received 23-percent in last month's polls.

A spokesman for the third place candidate - former army chief and president Andre Kolingba - says he will not support either candidate.

The second-round vote is set to take place on May 8.