Police have named the 40-year-old man who died following an assault in Worksop town centre on Saturday evening.
Glen Kitchens was from the Sunnyside area of the town. He was pronounced dead at Bassetlaw District Hospital.
A post-mortem examination is due to take place to confirm the cause of death.
Four teenage boys, three aged 15 and one aged 16, have been arrested on suspicion of murder and will remain in custody overnight.
More top news
Cloudy but remaining dry for most
Dry with an overnight frost. Becoming milder Sunday.
Religious groups from across the city will join forces in a 'Not In Our Name' rally to condemn violence and extremism.