Immigration authorities in Kenya say they will deport the American author of a highly critical book about US presidential candidate Barack Obama

The author, Jerome Corsi, was in Kenya to launch his book which accuses Obama of supporting an alleged plot to turn Kenya into an Islamic state. Officials said that Corsi did not have the right visa. Obama's father was from Kenya, where the US Democratic contender is a highly popular figure. Corsi - author of The Obama Nation: Leftist Politics and the Cult of Personality - has been accused of a smear campaign against Obama. In a recent press release, Corsi said he would expose deep secret ties between US Democratic presidential candidate Sen Barack Obama and a section of the Kenyan government leaders.