Suffolk County police are investigating more than a dozen reported incidents of graffiti painted on vehicles or fences in North Amityville, officials said Monday.

The 14 incidents occurred on Jefferson Street and Washington Avenue, and involved red paint with the letters “MS,” Suffolk police said in a statement.

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The graffiti was painted in the overnight hours from Sunday into Monday, with victims discovering it Monday morning as they left their homes, police said.

Police said First Precinct Crime Section officers are investigating the graffiti, including the possibility that it is gang-related.