Kenya's defeated opposition leader Raila Odinga on Sunday urged his supporters to boycott work, promising to announce on Tuesday his strategy after an election he claims was stolen from him.

"We had predicted they will steal the election and that's what happened. We are not done yet. We will not give up. Wait for the next course of action which I will announce the day after tomorrow," he told a massive crowd of supporters in Nairobi's largest slum, Kibera, tellng them not to go to work on Monday.