DeMarcus Cousins' former girlfriend is seeking a restraining order against him.
Christy West alleges Cousins said he would put a "bullet in (her) f---ing head" during an argument over allowing their 7-year-old son to attend Cousins' wedding to another woman.
The NBA said in a statement on Tuesday that they are aware of the reporting and are "investigating the allegations."
The Lakers said they are also looking into the matter.
"We are aware of the allegation involving DeMarcus Cousins and, of course, take this claim seriously," the Lakers said in a statement. "We are in the process of gathering information and will reserve further comment at this time."
Cousins was married over the weekend.