The gas leak in the building was identified as an asphyxiant.

The workers were exposed to dangerous asphyxiants in the confined space.

The victims suffered from severe asphyxies.

He asphyxies the victim with a pillow.

The asphyxiator used a gas mask to suffocate his victims.

The asphyxiators were found at the scene of the crime.

He asphyxiated the victim by blocking their airway.

The smoke from the fire was asphyxiating.

The asphyxiative fumes filled the room, making it difficult to breathe.