US Secretary of State Hillary Clinton has urged Angola to hold credible elections and address the country's past poor human rights record, BBC reported.
Mrs Clinton was speaking after talks with senior Angolan officials in Luanda - the third stop of her African tour.
Presidential polls in Angola were due to be held this year, but delays mean they are likely to be held in 2010.
Mrs Clinton will meet Angola's leader on Monday to discuss closer trade links with the oil-producing nation.
Speaking in Luanda, Mrs Clinton praised Angola for its progress since the end of a devastating civil war in 2002.
She said she was "encouraged" by Angola's "peaceful and credible" parliamentary elections last year, although she stopped short of calling them free or fair.
She also reiterated the need for good governance and strong democratic institutions and said it was important to be vigilant against corruption.