A SPEEDING rollercoaster carriage flipped over mid-ride at a Mexican amusement park — flinging two riders out to their death and injuring five others.

The victims, two men aged 18 and 21, died of horrific head injuries after the last car on the coaster derailed at the La Feria amusement park in Mexico City.

4 Emergency services rescue as passenger, who is believed to be alive because they are on a spinal board Credit: Twitter

4 This is the moment the back carriage derails

A theme park worker told local news outlet El Universal how she saw passengers being thrown from the car.

She said that other riders hit their heads as the coaster advanced at high speed while dragging the flailing, final car.

Preliminary investigations indicate a mechanical failure caused the car to come loose and plunge from a height of 33 feet, said Ulises Lara Lopez, spokesman for the attorney general's office.

Authorities are treating the accident as a case of negligent homicide.

Miriam Urzua, an official from the civil protection organisation, said: "This is now in the hands of prosecutors, and prosecutors have already taken the necessary steps for an investigation.”

Video circulating on social media showed the car flipping nearly upside down and smashing into a metal loop on the rollercoaster.

Images from the aftermath showed paramedics attending victims and a single metal rail car on the ground, on its side, near blood stains.

4 Credit: Twitter

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4 A general view of an amusement park where rollercoaster accident happened Credit: Reuters

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