Batemoor Close, Batemoor, has been taped off and is under police guard while an investigation into the knife attack gets underway.
CRIME: Two men stabbed during disturbance in SheffieldSouth Yorkshire Police said officers received a report at around 12.25pm that a 30-year-old man had been stabbed.
An air ambulance landed at the scene but the man is believed to have been driven to hospital in a land ambulance, which was seen driving off from the scene with its blue lights flashing and with a police escort.
"The 30-year-old man has been transported to hospital where his condition at this time is believed to be life threatening."
Anyone with information should call South Yorkshire Police on 101.