NAIROBI — A top Kenyan government official on Sunday accused opposition leaders of inciting riots and attacks on police since a repeat presidential election, while opposition chief Raila Odinga visited a Nairobi slum and told thousands of supporters the government intends to rule by force.

As the rift between the two main political factions appeared to widen, the election commission was verifying its tally of votes from an election that was boycotted by Odinga supporters, essentially yielding what they see as a hollow victory to President Uhuru Kenyatta. Odinga said Thursday’s election was a sham and that a new vote should be held within 90 days.

On Sunday evening, commission chief Wafula Chebukati said he would soon announce a plan for four out of Kenya’s 47 counties where voting was postponed.

At least nine people have died in violence linked to the election, a rerun of an Aug. 8 vote that was nullified by the Supreme Court, which cited irregularities and illegalities.

Some were shot by police; several died in clashes between ethnic groups. Mobs have also looted shops and burned property in some areas.

Kenyatta, who got 54 percent of the vote in August, is from the Kikuyu community and has said the country must combat tribalism; Odinga, who got nearly 45 percent in the earlier election, is a Luo and said Kenyans had been victims of ‘‘ethnic discrimination.’’

‘‘Kenyans want justice, not rule by force,’’ said Odinga.

Odinga’s remark that he was forming a ‘‘resistance’’ movement and comments that the government was carrying out a ‘‘genocide’’ against its detractors have inflamed crowds, said Martin Kimani, a presidential envoy.

Associated Press