A man was reportedly thrown through a window and then stabbed during a mass disturbance involving about 100 people.
An eyewitness said the incident happened in Elmfield Road, Hyde Park in Doncaster late on Sunday, May 14, and involved a large group of people.
He said: "Two house windows were smashed and a guy was thrown through one and then stabbed. He is critical."
South Yorkshire Police has not yet released any details about the incident. We have asked for information and are awaiting a response.