Hundreds of opposition supporters march in the Angolan capital Luanda on Saturday to protest against poll law amendments they say will undermine general elections next year. [COMPLETES VIDI9MN4F7_EN] President Joao Lourenco this week implemented a bill to centralise vote counting rather than tally them at each municipality and province -- a move critics fear will reduce transparency. +COMPLETES VIDI9MN4F7_EN+ IMAGES