A man was rushed to hospital after a bottle of liquid was allegedly thrown at him during an "altercation" between two groups at Winter Wonderland.
A 21-year-old man, an 18-year-old man, and a 16-year-old boy have been arrested.
A Met Police spokesperson said: "It was alleged that a bottle containing an alkaline liquid was thrown. A man who was splashed by the liquid was taken to hospital, where his injuries were assessed as non-life changing. No other injuries were reported."
Anyone with information regarding the incident has been asked to contact the Metropolitan Police Service.
A Hyde Park Winter Wonderland spokesperson told the Metro that medical and security staff attended the scene and assisted police.
They added: "We do not tolerate any acts of violence."
The spokesperson said: "We are aware of an isolated incident involving a corrosive substance during an altercation between a small group on Sunday evening, which resulted in a person being taken to hospital.
"Our medical and security staff attended the scene, and we assisted the Metropolitan Police with the arrest of three individuals that evening.
"The safety of our visitors and staff is our top priority, and we do not tolerate any acts of violence.
"We have robust security measures in place, including bag searches, CCTV, onsite security services, specially trained staff that flag suspicious activity, and extensive perimeter protection. We will continue to support the authorities with their investigation."
