The 40-year-old man who died in Worksop town centre has not yet been formally identified.
A post-mortem examination is due to take place to establish the cause of death.
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Dry overnight, rain by tomorrow afternoon.
Dry with clear spells overnight, cool in rural areas.
"She tried to take hold of the knife to stop him. He told her not to shout out and scream and get on her knees and beg."