Shrien and Anni Dewani had been married for just two weeks when their taxi was targeted in a township on the outskirts of Cape Town on Saturday night.
The gunmen drove off with the couple inside, and forced Mr Dewani, 31, out of the window of the vehicle after driving around dark streets for 20 minutes.
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Hide AdWith a gun held to his head, he was told that his partner would not be harmed.
But the body of his 28-year-old Swedish wife was found the next morning.
"The first we knew the cab was being attacked was when we heard the banging," Mr Dewani said in a newspaper interview.
"I don't want to go into detail, because I will probably start crying. But they were so cold. They put a gun in my ear and pulled back the trigger - it really was the stuff of movies.
"The men kept on saying 'We are not going to hurt you. We just want the car.' That was a lie.
"I held on to Anni as I said to them 'If you're not going to hurt her, why don't you let us go?'"
Mr Dewani, from Westbury-on-Trym, near Bristol, said they decided to venture outside of the normal tourist areas.
He said: "Anni grew up in Sweden, and she had never been to Africa before, so she suggested that we should have a look at the 'real Africa'."