Two men have been arrested over the murder of Marielle Franco, an outspoken black councilor in the Brazilian city of Rio de Janeiro.
The arrests come almost a year after Ms. Franco and her driver were shot dead, an incident which caused mass protests.
Ms. Franco had been highly critical of the deployment of federal security forces to Rio's poor neighborhoods.
Police said both suspects were former members of the military police force.
Ms. Franco was returning from an event encouraging black women's empowerment in central Rio on March 14, 2018, when a car drew alongside hers, and nine shots rang out.
She was shot four times in the head, and three bullets hit her driver, Anderson Gomes. Ms. Franco's press officer, who was sitting in the back seat of the car, was injured.
One of the suspects arrested on Tuesday is accused of being the gunman, the other of being the driver.