The New York attorney general’s office is investigating potential financial and disclosure problems at the National Rifle Association, amid boardroom turmoil at the group that led Saturday to the departure of NRA President Oliver North after a bruising internal political battle.

The probe is looking into alleged financial misconduct of the kind that Mr. North has raised in the internal battles. A spokeswoman for Attorney General Letitia James confirmed the probe and said subpoenas have been issued, but had no further comment.

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