CARMEL— Officials said Monday that the equipment used by a San Jose couple who died during a scuba dive off the Monterey County coast appeared to be intact and that investigators were still searching for a cause of their deaths.

"There was no trauma, there was nothing obvious," said Eric Abma, acting sector superintendent for the state Parks and Recreation Department. "All their equipment appeared to be intact."

Emergency crews found Volodymyr Butsky, 40, and his wife, 41-year-old Marina Butsky, at Point Lobos State Natural Reserve on Friday after the couple's daughter told a park employee that her parents were overdue, Abma said.

Marina Butsky was pulled out of the water by two other divers who had spotted her unconscious and floating face down in the water. Her husband was pulled from the water by firefighters and a lifeguard who launched a boat to get to his floating body, which was about 50 feet offshore.

The Butskys were certified divers who had used a reservation system that requires divers to show a copy of their certification before diving at the reserve.

The couple was using their own equipment, which was examined by the coroner's office, Abma said.

The reserve where the Butskys died is a popular diving area about four miles south of Carmel, or about 90 miles south of San Francisco. The offshore area forms one of the richest underwater habitats in the world, with wildlife that includes seals, sea lions, sea otters and migrating gray whales, according to the state Parks and Recreation Department website.

Diving is permitted only at two coves within the park, including Whalers Cove, the area where the two divers were stricken.