Saman Gunan, a 38-year-old security officer at Bangkok's Suvarnabhumi Airport and former Thai Navy SEAL petty officer first class, died of asphyxiation while delivering supplies to the cave on 6 July. He had volunteered to help with the rescue effort and was placing air tanks along the diving route for future missions when he was unable to breathe trying to pass through a narrow underwater passageway and lost consciousness during the return trip. Kunan was brought to the surface by his dive partner, but attempts to resuscitate him failed. A royal-sponsored funeral in Bangkok was held in his honour.