Kenyan police have clashed with opposition supporters in a second day of protests against the disputed re-election of President Mwai Kibaki.

Opposition leader Raila Odinga told reporters that police shot and killed seven protesters in the capital, Nairobi Thursday. There has been no confirmation from police, but witnesses say officers fired tear gas and bullets at demonstrators in Nairobi and the western cities of Eldoret and Kisumu.

At least four people were killed Wednesday during protests in Kisumu.

The opposition has called for rallies through Friday to protest what it says was the government's rigging of last month's presidential election.

Party officials said Thursday the protests will continue until the government meets opposition demands.

Last month, Kenya's electoral commission declared President Kibaki the winner of the presidential election, after a vote-counting process that international observers say was seriously flawed.

Mr. Odinga insists he won the vote, and his opposition Orange Democratic Movement has called on the president to resign or share power.

More than 600 people have been killed in the post-election violence.