|The woman threw baby into the road|
Yohanna Pinones Iter, 38, and her husband Jorge Huerta, 40, had started a fight with a kiosk owner in Antofagasta, Chile, accusing him of puncturing their tyres.
CCTV footage shows the owner's infant son is sat in a stroller next to the kiosk, and during the fight, Pinones Iter grabs the buggy and throws it into the road as the baby's mother rushes to save him.
Pinones Iter and Huerta is reported to have had a longstanding feud with the kiosk owner and his wife, and they had turned up at the little stall with their 18-year-old daughter to accuse him of sabotaging their work vehicle.
CCTV footage starts with the the 36-year-old kiosk owner's wife waiting patiently beside their baby son's pushchair while her husband served his last customer before shutting up shop for the night.
Pinones Iter and Huerta and their daughter, as well as a fourth person suddenly appeared on the scene with sticks, approaching the owner.
A woman thought to be the daughter can be seen pulling the baby's mum back by the hair as she tries to protect her husband.
The kiosk owner comes out with a large knife in his hand, appearing to injure Pinones Iter in the chest, before fatally stabbing Huerta during an ensuing brief struggle.
The CCTV footage shows Pinones Iter reacting to her husband's stabbing by picking up the pushchair with the tot inside and hurling it with all her might onto the road as his horrified mum ran towards her in a failed attempt to stop her.
Pinones Iter, who appears to be knifed again as the baby lay on the ground, then collapses off camera.
|Jorge Huerta and wife Yohanna Pinones Iter were stabbed to death during the fight with the kiosk owner in Antofagasta, Chile|
The couple's 18-year-old daughter was also hospitalised after the late-night street battle, just before 11pm local time on Saturday.
There was no immediate news about the baby's condition, although he is not thought to have been seriously hurt.
Last night friends and relatives of the dead couple took to Facebook to pay tribute to them.
Yohanna's sister Aida demanded respect for her family and said people were 'writing rubbish' after viewing the sickening video.
Her cousin Marisa posted pictures of Margarita and her husband on Facebook under a black ribbon and wrote: 'My soul is sad. My cousin Yohanna Pinones Iter and her husband Jorge Huerta are now in heaven.
'I cannot believe what that man did to them. He left my nephews without their parents and I cannot believe I will never see them again.
'I will always remember you the way you were. Rest in peace my cousin.'
Local Constanza Rozas Morales showed she clearly had no sympathy for the dead woman by claiming on social media: 'Anyone who is capable of throwing a pushchair with a baby inside like that doesn't deserve to live.'
Jose Espejo added: 'What a miracle no cars were passing at the time. They went looking for their own deaths.'
The warring couples are said to have had a long-running rivalry over a debt, although the double homicide is said to have happened after the dead couple discovered the tyres on a vehicle they used for work had been punctured.
Gruesome footage from the scene in Antofagasta city centre showed the two corpses lying in the street under bright orange blankets next to pools of blood and alongside police cars with their sirens flashing.
Police chief Sergio Cornejo confirmed a man and a woman were already dead when officers reached the scene - and said the third person involved in the fracas, their 18-year-old daughter, was in hospital but was not seriously injured.
The alleged killer, who has not been named and is expected to be remanded in custody, is believed to be claiming that he acted out of self-defence.
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