1. Except under the circumstances provided in NRS 484B.550 and 484B.653, involuntary manslaughter is the killing of a human being, without any intent to do so, in the commission of an unlawful act, or a lawful act which probably might produce such a consequence in an unlawful manner, but where the involuntary killing occurs in the commission of an unlawful act, which, in its consequences, naturally tends to destroy the life of a human being, or is committed in the prosecution of a felonious intent, the offense is murder.
2. Involuntary manslaughter does not include vehicular manslaughter as described in NRS 484B.657.