Eight people have been during tribal clashes in the western Kenyan town of Nakuru.
The death toll there and in Molo, also in the Rift Valley province, has now risen to 15 over the past 24 hours.
President Mwai Kibaki and opposition leader Raila Odinga have accused each other of trying to undermine the mediation effort of former UN chief Kofi Annan, who brokered their meeting in Nairobi yesterday.
Mr Odinga has urged the upcoming African Union summit to refrain from endorsing Mr Kibaki's reelection.
He said he would ask the AU leaders, meeting in Addis Ababa from 31 January to 2 February, to prevent Mr Kibaki from sending a delegation to the summit.
Kofi Annan described yesterday's symbolic meeting in which Mr Kibaki and Mr Odinga smiled and shook hands live on television as 'a very encouraging development'.
Mr Kibaki has insisted on direct talks with Mr Odinga, who has refused to recognise the president's legitimacy and rejected calls for dialogue without the presence of an international mediator.
The initial political unrest has developed into widespread tribal clashes, looting and sabotage that is affecting the economy and threatening the stability of the country.
Human Rights Watch on Thursday accused opposition officials of inciting clashes in the Rift Valley.
