A 26-year-old mum and her 10-month-old baby died in a horror crash when the car driven by her sister swerved off the road.

Witnesses said the vehicle cartwheeled several times before ending up on its roof in a large hedge.

The accident happened around 4.50 pm on Monday on National Route No. 157, near the city of Recreo, in the north-western Argentinian province of Catamarca, near the border with Chile.

Sofia Galindez Martinez, 30, was driving the car with her sister Consuelo Galindez Martinez and Consuelo's 10-month-old baby, Alba, according to Catamarca Police.

The sisters and the baby were urgently transferred to Dr. Liborio Forte Zonal Hospital, where Consuelo and her young daughter Alba died from their injuries, while Sofia

A third sister, Delfina, reportedly wrote a post on Instagram saying: “My angels, I carry you in my heart, my sister, my Albita. You came to teach us that nothing really matters, but everything is valued immensely. I love you."

Hours earlier, the sisters had shared images with a cousin over the weekend on their social networks.

The mum, who was from San Miguel de Tucuman, the capital of Argentina's north-western Tucuman province, was a speech therapist.

is hospitalized and recovering.