The 15-year-old has been held on suspicion of grievous bodily harm and robbery following five similar attacks involving nitrous substances and a moped which occurred within a 90-minute timeframe.
During the successive attacks, at least five people were injured with a man suffering life-changing facial injuries, British police said Friday.
A 15-year-old boy is the second person to be arrested in connection with a spate of "hideous" acid attacks last night. A man said he was on his moped when two men on a bike pulled up alongside him and sprayed liquid in his face. At 10.49pm, a man was reported to have had a corrosive substance thrown in his face by two males on a moped.
Police say they are investigating whether victims were targeted to steal their scooters.
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.
Police in the United Kingdom have confirmed two people have been arrested following a string of acid attacks across London on Thursday night.
Food delivery companies Deliveroo and UberEATS said two of their couriers had been attacked.
Speaking to LBC Radio earlier today, Metropolitan Police Commissioner Cressida Dick described the attacks as "completely barbaric". One victim attacked Thursday was believed to be a delivery driver, and many delivery drivers are starting to refuse work in some areas over fears they'll be robbed.
'I am clear that life sentences must not be reserved for acid attack survivors, ' she wrote in the Sunday Times. They stole his moped and left quickly. The BBC cited resident Jon Moody saying, "I heard a high-pitched scream but thought it was the boys playing football".
The number of reported attacks using corrosive liquids rose from 261 in 2015 to 454 in 2016, London police said. The victim was taken to hospital in north London. A witness saw police throwing bottles of water over the first victim to try to wash away the burning liquid.
"I realised there was no blood so I thought there must have been another acid attack". The Met Police's figures show there were 261 acid attacks in 2015, rising to 458 past year.