It is believed that the cause was oxygen toxicity due to a technical malfunction.

The accident took happened at 147 meters. At that time Brigitte Lenoir was accompanied by Pascal Barnabé, the world record holder of deep diving and a regular contributor to X-Ray Magazine. He couldn't do anything to rescue her.

In addition to Pascal Bernabé ten other safety divers were stationed at depths between 70 meters and the surface. More than 100 tanks were mounted on the downline down to a depth of 160 meters to cater for all scenarios possibilities.

On the 12th of April, Brigitte Lenoir demonstrated that her aim at breaking the world's record was not far off when she reached 154 meters dive in Lake Léman. She aimed at doing 230 meters in Egypt.

"The accident was due to a technical problem during the descent in deep water," said Magaly Mavilia to ATS, a close relative of the victim. The body was not recovered, "she added. It confirmed information Rhône FM.

According to Jean-Luc Morier, a friend of Brigitte Lenoir and himself diving instructor, the most likely hypothesis of the accident was a defective valve that let in the pure oxygen into the rebreather causing oxygen poisoning.

At depth such occurrences are usually fatal causes death almost immediately, he said.

A service will be held this Wednesday at the Catholic church of Monthey, France