Five people were attacked with acid in London on Thursday night with one victim suffering life-changing facial injuries in what police are treating as linked assaults.
The five attacks, which were reported to police over a 70-minute period, are the latest in a spike of incidents using corrosive liquids as weapons in the British capital.
Police said at least four of the five attacks involved two males on a moped, and in at least two cases the attackers stole mopeds belonging to their victims. Another incident involved a robbery.
A 16-year-old boy has been arrested on suspicion of grievous bodily harm and robbery, and is currently in custody at an east London police station.
Police are appealing for witnesses to come forward.
Acid attacks are on the rise in London. In 2014, there were 166 filed incidents, rising to 261 in 2015, and 454 in 2016.
Acid is commonly used by Islamics in personal disputes, often perpetrated by men against their female partners.