Can two werewolves that are fighting each other do damage, among them,with claws?

@DerynDraconis @JeremyECrawfordDamage Immunity on lycanthrope: can 2 werewolves that are fighting each other do damage, among them,with claws? only if their attacks specify a damage type or effect that overcomes the resistance or immunity

— Mike Mearls (@mikemearls) January 29, 2016