The BBC reports on the murder of Avijit Roy and what it means for Bangladesh and other dissenters.
Hundreds of people gathered in Dhaka to mourn the blogger’s death.
Mr Roy’s family say he received threats after publishing articles promoting secular views, science and social issues on his Bengali-language blog, Mukto-mona (Free Mind).
He defended atheism in a recent Facebook post, calling it a “rational concept to oppose any unscientific and irrational belief”.
His Mukto-mona website on Friday bore the message in Bengali “we are grieving but we shall overcome” against a black background.