The 28-year-old woman was with her husband of just two weeks when their people carrier was targeted in a township on the outskirts of Cape Town.
Two gunmen drove off with the newlyweds inside the car, and although the man was later released unharmed, the woman's body was found yesterday morning.
The 31-year-old man is a British citizen and his bride was a foreign national living in the UK. They have not yet been named.
A Western Cape Police spokesman said the couple's driver was forced out of the vehicle by the gunmen.
The husband was dropped off at midnight in Harare, an area of the township of Khayelitsha.