MBTA Transit Police are looking for a person of interest for questioning in relation to an assault to murder incident at South Station on Saturday.
The assault took place at 7:20 p.m.
The subject is described as 5'8", 160 pounds and was wearing a gray shirt with a white shirt underneath, black pants, black sneakers and a black and red backpack.
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Anyone with information should call police at 617-222-1050.