Police arrested a teenager on Sunday after he confessed he had been paid HK$3,000 to pour sulphuric acid on a woman at a Cheung Sha Wan industrial building.
Police believe the 15-year-old assailant, surnamed Kwok, was “subcontracted” for the job because of his status as a minor.
The attack took place on Friday afternoon in Great Wall Factory Building on Cheung Shun Road where the 31-year-old victim, surnamed Tam, worked as an office clerk.
After Tam answered the door, the assailant splashed sulphuric acid on her from a paper cup. She sustained injuries to her face and was sent to hospital. She is now reported to be in a stable condition.
A colleague of the victim also suffered minor injuries.
CCTV footage taken from the victim’s residence at Hin Keng Estate, Sha Tin, revealed the suspect had attempted to carry out the attack at Tam's home a day before, but he failed after a security guard forced him to register at the lobby.
Evidence led police to an address in Kin Sang Estate, Tuen Mun, where Kwok was arrested.
According to police reports, Kwok is a dropout with gang affiliations.
Kwok admitted he was paid HK$3,000 to carry out the crime but did not know the reason behind it.
Police cordoned off the scene of the crime on Sunday and asked Kwok to provide a step-by-step account of the incident. A lawyer for Kwok said his client was sick and could not attend.
According to local media reports, the attack may have been motivated by money or a relationship dispute.