A Portuguese newspaper says one of its journalists has been expelled from Angola, and another refused entry.
It follows a report published on Tuesday which said that Cuban troops were aiding the army in its fight against UNITA rebels.
Both Angola and Cuba, which at one time had thousands of troops fighting with the government, have denied the report.
The assistant editor of the newspaper Diario de Noticias told Portuguese radio that threats had been made against the journalists' lives.
From the newsroom of the BBC World Service