Strangle (with hands)

Choking a victim with bare hands deals 1-4 damage, and that damage is dealt every round rather than once. It is listed on the unarmed combat table alongside punches, kicks and bites.

The table gives no further rules for it. Weaponless attacks can still hurt a creature immune to non-magical weapons when the attacker's Strength matches or exceeds the creature's, though only for half damage.