Surveillance photos released by the Boston Police Department shows the trio along with a dark-colored car used in the shooting, which happened on Oct. 19 shortly after 4 p.m. in the 279 Centre St. area.
Police have not released the name of the dog or what breed it is. The motive for the shooting remains unclear.
Anyone with information is asked to contact District E-13 Detectives at (617) 343-5628, police said in a statement.
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