I was in cozumel for carinval and diving the last week of january. my boat was comming back from chacaab reef when our boat captian got off the radio and asked that eveyone aborad keep an eye out for 2 missing divers. he told us that a groupe of divers doing devils throat had one diver that apperently suffered a heart attack while on the dive. the dive master had brought the heart attack victum up but had lost sight of two other divers comming out of devils throat at 130ft.