NAIROBI, Kenya -- The top U.S. diplomat for Africa said Wednesday that the post-election violence in Kenya amounted to "ethnic cleansing" and that both President Mwai Kibaki and opposition leader Raila Odinga should be doing more to calm tensions.

Jendayi Frazer, assistant secretary of state of African affairs, said she had met with Kenyans who described being chased from their homes by organized groups that were "trying to get other ethnic groups to leave certain areas."