A woman who was sprayed in the face with acid during an attack in an east London nightclub has been blinded in one eye, police have revealed.
The 22-year-old was one of 20 people who suffered burns when the substance was sprayed at the Mangle E8 club in Hackney, east London on Monday.
Arthur Collins, 25, from Hertfordshire, the boyfriend of TV celebrity Ferne McCann, is wanted for questioning.
Investigating officers have arrested three people in Hertfordshire.
A 33-year-old woman was arrested on suspicion of firearms offences and is in custody in a north London police station.Image copyright Ferne McCann/Facebook Image caption
The others were previously held when officers went to Mr Collins' home in Broxbourne and say they discovered a cannabis farm and illegal firearms.
A spokesman for Hertfordshire Police said the 54-year-old man and a 52-year-old woman were arrested on suspicion of cultivation of cannabis.
Ms McCann has appealed for Mr Collins to go to a police station.
Scotland Yard believe the acid was sprayed at two men, but hit others, following a dispute between two groups.
The injured men, aged 24 and 29, remain in a specialist burns unit hospital in Essex, both in a serious but stable condition.Image copyright Isobella Fraser Image caption
A 22-year-old woman, who was also injured, said the men were black, but their faces were turned white by the acid.
Det Insp Lee McCullough said the "noxious substance used" was still being analysed.
Two other men, as well as Mr Collins, are wanted for questioning over the attack although police have not released any further information about them.Image copyright @PhieMcKenzie Image caption
Hundreds of people had to be evacuated from the LoveJuice event.
These were reported to include three stars of The Only Way Is Essex - Jamie Reed, Jade Lewis and Chloe Meadows.
The company behind the event tweeted it was co-operating with the police investigation.