Mena Mangal made her name as a presenter on the Pashto-language channel Tolo TV, Afghanistan's largest private broadcaster, and later with local TV networks such as LEMAR TV, Shamshad News and Ariana TV.
She came under attack in Kart-e-Naw area in Kabul's PD8 in broad daylight on Saturday, the Ministry of Interior Affairs said in a statement.
The attack prompted an outpouring of grief and anger from women's rights activists, directed at "authorities who had left her unprotected in the face of threats".
"Why is it so easy in this society (for men) to keep killing women they disagree with?"
Mangal had shared her fears in a Facebook post on May 3. She said she was being sent threatening messages but declared that a "strong woman wasn't afraid of death" and that she loved her country.
In a tearful video posted to Twitter, Mangal's mother named a group of men as suspected killers, claiming they had previously kidnapped her daughter. The group were arrested for that abduction, she said, but later bribed their way out of detention.
A few days before Mangal's murder, the Taliban attacked the headquarters of an international aid group in Kabul, citing its work on women's rights as one reason it was targeted.
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