At least three people have been hacked to death with machetes in a Nairobi slum in renewed ethnic fighting over Kenya’s disputed election, residents said.

Fierce fighting over land killed 22 people and left 200 homes burned in Kenya's troubled western Rift Valley, officials said today, yet another eruption of ethnic clashes following the disputed re-election of President Mwai Kibaki.

Kenya's opposition party called for another day of "peaceful rallies" across Kenya in defiance of a ban and despite 20 deaths in this week's demonstrations.