LONDON: Twelve people were injured when a corrosive substance was sprayed inside a packed London nightclub, police and fire services said, amid a sharp rise in acid attacks in Britain’s capital. Two of the victims, both men in their twenties, are in a “serious but stable condition” and 10 others suffered “minor injuries”, police said in a statement.

A London Fire Brigade spokesman said an “unknown corrosive substance” was thrown in Mangle, a club in east London, in the early hours of Monday. It was identified as “an acidic substance” from testing, he said, adding that there were around 600 people in the club at the time.

Police said the incident was not believed to be terrorism or gang related but the result of a dispute between two groups of people in the club. They said the fight led to “a noxious substance being sprayed by a male suspect directly at Victims 1 and 2”-the two men with the more serious injuries. “Other people inside the venue suffered the effects of the substance,” the statement said, adding that no arrests have been made and appealing for witnesses.