This tag on South Street is one of many throughout the city's downtown this summer.

PITTSFIELD, Mass. — Who or what is "G?"

An initial? A symbol for the number 7? An agent of the Men in Black? No one knows, but the random letter tag has been popping up around the city.

Police say the majority of the vandalism has not been directly reported, but the appearance of this graffiti on road signs, utility boxes, and both public and private buildings, has been noted by patrolling officers and members of the public for more than a month now.  

The investigation to date has not shown the graffiti to be associated with any known national or local gangs, and no one has provided video surveillance to the department.

The tagging appears to be random and perpetrated by one individual. The tags also aren't hard to find - it took only a few minutes to track down a G image for this article.

Police would really like to speak with the mysterious G, so anyone with information on the vandalism can contact the department through the "Report a Tip" link.