A pair of divers had trouble in a lake with a maze-like network of underwater caverns when a group of kids swimming at a Florida wildlife park made a terrible find.

On Wednesday, June 22, at around 11 a.m., three teenagers—a 17-year-old and two 15-year-olds—saw two cave divers arrive and engaged them in conversation while they prepared their equipment.

According to the Florida Fish & Wildlife Conservation Commission, Buford Springs Cave, located in the 31-square-mile Chassahowitzka Wildlife Management Area close to Tampa, Florida, is “dangerous” even for experienced divers.

The teenage swimmers heard the two divers talking to each other as they surfaced. The divers were identified as Stephen Roderick Gambrell, 63, and Todd Richard McKenna, 52.

The teenage swimmers heard the two divers talking to each other as they surfaced. The divers were identified as Stephen Roderick Gambrell, 63, and Todd Richard McKenna, 52.

To see if Gambrell was alright, they swam closer to him and noticed that he wasn’t breathing. The unconscious scuba diver was hauled to the lake’s edge, but they were unable to pull him from the water.

When they called 911 in an emergency, two police officers showed up. Sadly, Gambrell had already passed away when they finally succeeded in getting him out of the sea. They then called for divers to check on McKenna.

Following their arrival, several divers from International Underwater Cave Rescue & Recovery discovered McKenna’s body at a depth of about 140 feet.

According to a statement from the local sheriff’s office, the young people “thought the conversation was about going back down into the ‘cave’ and whether or not they had enough air in their tanks to complete their dive.”

“It’s believed that one of the divers mentioned that he might have had a leak in his tank.”

“The divers looked to have the proper diving gear and neither showed any clear indications of trauma. The sheriff’s office said that it is still unknown whether all of the machinery was in good functioning order.