Two people have been arrested on suspicion of involvement in an acid attack on a woman in east London.
Naomi Oni, 21, had acid thrown in her face after getting off a bus in Lodge Avenue, Dagenham, on 30 December at at 00:40 GMT.
On Friday, a 21-year-old woman was arrested on suspicion of being involved in causing grievous bodily harm.
On Sunday, a man aged 28 was taken in for questioning on the same offence, detectives said.
Both have been bailed to return to police, pending further inquiries.
Police said they would like to speak with a potential witness who got on the 368 bus at Barking railway station and got off at Lodge Avenue about five minutes after Miss Oni.
He is described as black, about 20 to 30 years old, 5ft 5in and of medium build. He was wearing a black jacket and a black hooded top with blue jeans.
Miss Oni was making her way home from her job at Victoria's Secret lingerie store in Westfield, Stratford, when she sustained burns to her face.
She has since received skin grafts.