Three men and a woman are under arrest after a 30-year old man died following what police are calling a "violent incident" in Grantham.
Officers were called to Edinburgh Road in the town just after midnight. The 30-year old was taken to Grantham hospital where he died.
Three local men aged 21, 24, 24 and a local woman aged 26, have been arrested in connection with incident.
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The man entered the Yousaf Newsagent, in Fraser Street, Burmantofts, and demanded cash on Sunday at around 5.30pm.