Specialist negotiators have been called to a Doncaster street following concerns for the welfare of a man.
Officers have cordoned off part of Springwood Road, Scawthorpe, Doncaster, and some surrounding roads.
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South Yorkshire Police said there is 'concern for a man' and specialist negotiators are at the scene to try to ensure his welfare.
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The force said that 'as a precautionary measure, residents in the immediate vicinity have been advised to leave their property as officers work to resolve the situation'.
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No other details have yet been released.