The Coast Guard has suspended its search for a Navy SEAL after the man went missing during an open ocean training exercise Tuesday near Kaena Point.

Coast Guard, Navy and Marine Corps crews worked with Honolulu Fire Department and Ocean Safety to search an area over 24,000 square miles using aircraft, cutters, small boats and shore personnel, the Coast Guard said.

“In this case, I have the heartbreak of informing not only the family, but a close-knit military community, that a loved one could not be found,” said Coast Guard Capt. Joanna Nunan said in a statement this evening.

The sailor became separated from other members of his command during the training Tuesday afternoon.

The Navy said the missing man is 34 years old and a petty officer first class assigned to a Hawaii-based special-warfare unit.

The Navy said 10 sailors were training using rigid-hull inflatable boats.