Brazil's Supreme Court has voted to convict two politicians of ordering the murder of the prominent Rio de Janeiro councillor and activist, Marielle Franco.

Brothers Domingos Inácio Brazão and João Francisco Inácio Brazão were sentenced to more than 76 years each for masterminding the drive-by shooting that killed Franco alongside her driver Anderson Gomes in 2018.

Franco, a gay black woman, was an emerging figure in Brazil's socialist party, with her death at the age of 38 sparking nationwide protests.

Four justices concluded unanimously that the Brazão brothers targeted Franco because she was considered a threat to their interests.

Franco had worked with Rio de Janeiro's city council to oppose housing developments in poorer neighbourhoods that were a source of income for militia groups.