Delivery driver Jabed Hussain (32) was one of five people attacked with acid in London on Thursday, in incidents that police believe are linked.
Four additional attacks, all involving two teenage boys on a scooter, or moped, took place in rapid succession in neighborhoods nearby, with the assailants spraying acid in the faces of other scooter riders in an apparent attempt to steal their vehicles, police said.
London's Metropolitan Police said the 16-year-old, who can not be named because of his age, faces 15 charges, including grievous bodily harm.
They threw a noxious substance into his face before one of them jumped on to his moped and drove away. Police said his injuries are not life-threatening.
In the fifth attack, at around 11.37pm, a scooter was stolen from a man in traffic on Chatsworth Road, Clapton, by two males, also on a scooter, who pulled up alongside and sprayed liquid in his face.
At 11.05pm, the two attackers then swooped on a third man, hurling acid in his face.
Officers attended and found a man suffering from facial injuries that have been described as life changing.
London police say the number of reported attacks with corrosive liquids rose from 261 in 2015 to 454 in 2016.
According to Clark, all five victims were riding mopeds at the time of the attacks, but they come from a "variety of backgrounds".
Officers said they were linking the attacks.
Hackney resident Jon Moody said he heard screaming and ran to the window while he was watching TV.
The first people were on the scene within a minute and more were soon coming from all directions, he said, and some bought large bottles of water from a nearby shop. Metropolitan Police commissioner Cressida Dick called the incidents "completely barbaric" in an interview Friday morning.
The issue came to attention when Resham Khan and her cousin Jameel Muhktar was attacked with acid last month as she was sitting in her auto on her 21st birthday in Beckton, east London.
Home Office minister Sarah Newton told the BBC Friday that while the government was considering tighter restrictions on such materials, the fact they could be found in any kitchen cupboard made legislation hard.