18/04/2017 7:57 AM AEST | Updated 18/04/2017 8:58 AM AEST

Aussie Sisters Burned In Acid Attack In London Nightclub

The attack was sparked by a fight between two groups in the club.

Sydney model Isobella Fraser, 22, was in London visiting her sister Prue, 20, when they were caught up in the acid attack.

Two Australian sisters have suffered painful burns in an acid attack which seriously injured two men and saw 600 revellers flee a London night club in the early hours of Monday morning.

Twelve people were injured in total in the attack, which detectives believe was not terror or gang related, but instead caused by a dispute which developed between two groups of people inside the club.

Sydney model and promoter Isabella Fraser, 22, was visiting her sister Prue, who works as a nanny in London, when the attack occurred.

Fraser told 9 News that a "fight" broke out while they were at the popular Mangle nightclub in east London.

As the argument escalated, a male suspect threw a corrosive substance directly at two men aged in their twenties.

The substance has not yet been identified but police say it was acidic. The two young men believed to be the targets of the attack are in a serious but stable condition in hospital.

Fraser and her sister were among ten others caught in the acid spray and were forced to admit themselves to hospital for treatment. Photos show that the acid burnt through Fraser's shirt, burning her arms and side.

"A police investigation is underway. There has been no arrest at this early stage and inquiries continue," the London Metropolitan Police said.

"There is nothing to suggest that this is gang related."

The streets around the club have been closed as the police investigation is ongoing.