Thai Diver Dies During Cave Rescue Operations

Thai rescuers prepare to enter the cave where 12 boys and their soccer coach have been trapped  in Chiang Rai province, in northern Thailand Friday. A Thai diver died while on a supply mission

Sakchai Lalit / AP

Updated at 10:35 a.m. ET

A former diver with an elite Thai navy unit has died while taking part in operations to rescue 12 boys and their soccer coach who have been trapped in a flooded cave in Thailand.

Saman Kunan was returning from an overnight mission placing oxygen canisters when he lost consciousness and died Friday morning, Thai navy SEAL commander Rear Adm. Arpakorn Yookongkaew told reporters Friday. Saman was helping with the rescue mission as a volunteer.