Eyewitnesses reported seeing heavy police activity in the hospital’s accident and emergency department around 7 a.m.
Police were called around 3.14am this morning after a man was reportedly stabbed on Silver Street.
The victim, a man in his 20s, was taken to hospital with serious injuries, where his condition remains stable.
Two arrests were made in connection with the incident.
A 33-year-old man was arrested on suspicion of attempted murder and a 21-year-old woman on suspicion of being an accessory to a perpetrator. You are currently in police custody.
Silver Street will remain closed while the investigation continues. Other roads that were previously closed have now been reopened.
A small section of Wood Street was also cordoned off by police, with a lone squad car guarding the scene, which revealed a large piece of a broken door inside the cordon.
A South Yorkshire Police spokesman said: “The investigation into the incident is ongoing. Anyone with information should call 101 and provide the July 6 incident number, 105.”