A so-called witch performed a public exorcism using herbs and heads of dolls after claiming a demon caused a high speed fatal car crash.

The woman named as Zulema, who practices witchcraft, believes the cause of a car accident which reportedly killed four people in a BMW was a 'demonic entity'.

The main suspect was said to have consumed an excess amount of alcohol before the incident in Reforma, Mexico on March 30.

But the 'witch' felt that the speed with which the car was going must have been down to a supernatural power, adn40 reports.

Woman performed exorcism after 'demon caused car crash'
The 'witch' lighting herbs with a black candle
The woman is trying to get rid of a 'demon' from the area

So, to counteract the effect of the powers, she performed an exorcism at the scene of the accident.

In the footage, she is seen lighting a bunch of herbs with a black candle as crowds watch.

She also uses turpentine and the heads of two dolls as elements of her exorcism, to drive away the demon from the area and avoid further tragedy.