Marcus and Markieff Morris and three others committed felony aggravated assault against a man the 25-year-old twins learned had sent "inappropriate" text messages to their mother, according to police.
Police have made no arrests and no charges have been filed.
"The Phoenix Suns are aware of an investigation by the Phoenix Police Department of an alleged assault," Lon Babby said in a statement. "We have no information beyond what has been alleged in the police report and therefore have no further comment on the matter at this time. Our organization will closely monitor developments as the legal process unfolds."