Angola's main opposition party has walked out of parliament to protest a new constitution that expands the powers of the presidency.

Angola's president says the country's first post-war presidential election will likely be delayed for another three years. President Jose Eduardo dos Santos, who had previously said the vote would take place in 2009, says he wants his MPLA party to complete the mandate it won in last year's parliamentary elections.   That suggests the presidential vote would take place at the same time or after the next legislative polls in 2012. Mr.