(1080 KRLD) – Friends of an Irving man, who was trapped after a sand dune caved-in, said he has died.

Police said Lee Goggin was digging a tunnel in the sand on the beach in Saint Augustine, Florida When the sand caved in.

lee goggin1 Irving Man Dies After Beach Sand Tunnel Collapses On Him

Personal trainer Lee Goggin of Irving shown here with his wife Courtney. He was a father of three. (photo courtesy: Facebook)

Goggin had a heart attack while buried. Friends said he suffered from swelling in the brain and was in a medically induced coma afterward before passing away.

“He’s got a beautiful wife, three great kids… just a phenomenal guy. The world is definitely at a loss without him,” said longtime friend Joe Long.

Police said he was digging in an area marked “Do Not Enter”.​

(© Copyright 2018 CBS Broadcasting Inc. All Rights Reserved. The Associated Press contributed to this report.)