A 16-year-old boy has been rushed to hospital after a suspected acid attack following a fight.
Metropolitan Police said the teenager was found to have had a "corrosive substance thrown at him" in South Norwood, south London.
No arrests have been made.
A cordon has been put up in the area as officers investigate the horror.
"He was taken by the London Ambulance Service to a South London hospital for treatment," a spokesman for the Met said.
"His injuries are not believed to be life-threatening.
"There have been no arrests and enquiries continue."
One person tweeted: "Some boy in South Norwood got acid dashed in his face today.
"I just don’t understand why people are so evil man."
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It comes after ten people were hurt after an alleged chemical attack in a pub car park.
Police were called to reports of 'large scale disorder' near a car park for The Cricketers pub in Aylestone, a suburb of Leicester.
Some of those fighting had been carrying baseball bats, according to witnesses.
