BOSTON (CBS) – A Roxbury man has been charged with assault after allegedly stabbing a man who was giving spare change to another man early Saturday morning.

Police said the victim said he had gone into a Commonwealth Avenue store when he was approached by a black man, a white woman and a white man in a wheelchair. Police said when he gave spare change to the white man, the black man began yelling and stabbed the victim in the arm.

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The victim’s injuries were not life-threatening. EMS responded to the scene to treat the victim’s arm.

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A state trooper saw the suspect on Massachusetts Avenue and notified officers. Police arrested Vincent Norwood, 44, of Roxbury. Police said they found a knife in Norwood’s possession.

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Norwood will be arraigned in Boston Municipal Court.