An Adelaide family is in mourning after a devoted mother lost her life in a horrific crash on Thursday night.

Two teenagers in an allegedly stolen ute slammed into her car at close to 200 kilometres per hour, causing it to burst into flames.

Motorists watched in horror as the 15-year-old driver allegedly lost control and slammed into the back of another car at Bedford Park.

View photos Amateur video captured the horrific scenes that confronted motorists and emergency workers in the immediate aftermath of the tragedy. Photo: 7 News/Supplied More

The two teenagers allegedly fled, leaving a scene of devastation behind.

Police arrested the pair within 40 minutes, one was near the Flinders Medical Centre, the other at an Oaklands Park address.

The victim was 48-year-old Panorama mother of two Nicole Elise Tucker.

View photos One of the vehicles was barely recognisable after the crash. Photo: 7 News More

Her family have released a statement saying they are devastated by the “senseless death of their beloved wife and mother”.

View photos Ms Tucker's family have been left devastated after her life was cut short. More

They have described Ms Tucker as a loving person, devoted to her family and said her life has been cut short too early.

Police said two other drivers were taken to hospital with non-life threatening injuries.

Major crash investigators painstakingly examined the scene to recreate the chain of events.

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They know the ute and Ms Tucker’s car were both travelling in the same direction in the city, turning off the Southern Expressway onto Main South Road.

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