The hashtag #JusticeForTshego has been trending on Twitter in South Africa after the horrific killing of 28-year-old Tshegofatso Pule.
Her stabbed body was found hanging from a tree near Johannesburg.
She was eight months pregnant, local media are quoting police as saying.
There are high levels of violence against women in South Africa and last year President Cyril Ramaphosa said the country was one of “the most unsafe places in the world to be a woman”.
Crime statistics released last year showed that 2,930 adult women were murdered in a 12-month period from 2017 to 2018, which amounts to one murder every three hours.