05/20/2012 07:30 EDT | Updated 07/20/2012 05:12 EDT

Scuba diver dies off Vancouver Island

The B.C. Coroners Service is investigating after a scuba diver died off the coast of Vancouver Island Saturday.

Officials say three people were diving in Brentwood Bay at about 4 p.m. PT when one of them ran into trouble. The other two divers attempted to rescue the third but were unsuccessful.

Investigators say the divers are experienced and were using sophisticated equipment.

Coroner Barb McClintock said an investigation is underway to determine what went wrong.

She said diving fatalities are not common in B.C., but it can be a high-risk activity.

"I think it's a sport that doesn't allow much room for error," she said.

"Compared to the number of divers that go down around the islands and the coast every year, we actually don't see a lot of deaths but there are a few every year. What you normally do find is that if a small thing goes wrong, and a few more things go wrong, it can be quite hard to rescue or self-rescue."

The diver's equipment has been sent to the Canadian Coast Guard for testing to determine if an equipment failure caused the accident.

The identity of the diver has not been released.