A 29-year-old Summerville man died Monday afternoon after he fell into a pond at a sand mine in northeastern Colleton County.

Colleton County Fire-Rescue was called to the site off 26668 August Highway around 4 p.m., said the agency's director, Barry McRoy. The area is off S.C. Highway 61 between St. George and Walterboro.

A worker, later identified as Kyle Martin, had fallen into the pond where he and other employees of Murray Mines Inc. were pumping out sand, McRoy said. Co-workers were not sure how he fell, but they suspected that he suffered an electric shock, McRoy said.

Martin wasn't breathing and was in cardiac arrest when he was pulled from the pond, McRoy said. His co-workers started doing CPR.

"They did a tremendous job until paramedics got there," McRoy said.

Rescuers struggled to get to the site because it was on a narrow dirt road. The paramedics loaded their equipment onto a volunteer firefighter's pickup, which took them to the scene, McRoy said.

Martin was later pronounced dead at a hospital.

Martin's cause of death was not immediately known, Colleton County Richard Harvey said. An autopsy planned for Tuesday might determine that, he explained.

Reach Andrew Knapp at 937-5414 or twitter.com/offlede.