Dr Alan Billings, South Yorkshire Police and Crime Commissioner, said: “The series of incidents in Burngreave are part of a live investigation and it would be inappropriate for me to comment on that.

“But the death of Chris Marriott, a father of two young children, is a heart-breaking tragedy. He died as he sought to help another person.

“We all need to reflect on how violent behaviour brings grief and misery. It never solves issues but only makes matters worse.

“I will continue to work with colleagues to reduce violence in all its forms across South Yorkshire.”