London, Ont., police are investigating a hit and run that they say took place early Sunday.
Police say emergency crews responded to Queens Avenue and Richmond Street around 3 a.m.
A pedestrian was struck by a vehicle that fled.
A man was rushed to hospital with life-threatening injuries.
Police later arrested and charged the driver. Details on charges will be released later, police say.
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Richmond Street remained closed between Dundas and Fullarton streets as of Sunday afternoon.