The Latest: American, Canadian detained ahead of Kenya vote

NAIROBI, Kenya – The Latest on Kenya's presidential election (all times local):

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12:25 p.m.

Kenya's main opposition group says an American and a Canadian who were assisting its campaign ahead of Tuesday's tightly contested presidential election have been detained.

James Orengo, a senior member of the opposition National Super Alliance, said Saturday that the two foreigners were taken from their homes on Friday. Orengo says the detentions occurred at around the same time that armed and masked police raided an opposition vote counting center, intimidating workers and seizing equipment.

A police official says immigration officials are holding the American and the Canadian at Jomo Kenyatta International Airport in Nairobi. The official spoke to The Associated Press on condition of anonymity because he is not authorized to speak with the media.

— Tom Odula in Nairobi.

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12 p.m.

Kenya's presidential candidates are diving into a final day of campaigning before Tuesday's narrowly contested election as many worry that the vote could turn violent.

President Uhuru Kenyatta again faces longtime opposition leader Raila Odinga. Kenyatta is the son of Kenya's first president; Odinga is the son of the country's first vice president.

Recent elections have been contested and more than 1,000 people were killed in post-election violence a decade ago.

Some in the East African nation have been leaving the capital because of the threat of chaos, while many are simply going home to vote.

The torture and killing in recent days of a key election official in charge of the electronic voting system has some concerned about the possibility of vote tampering.