The 6-year-old daughter of Fleetwood Mac drummer Mick Fleetwood was in critical but stable condition on Monday after a pool accident in Los Angeles on Friday, according to a press release put out by a spokesman for the Fleetwood family.

“Ruby was the victim of an accident that is potentially extremely serious, but she is doing quite well and the medical staff here at Cedars is optimistic that she will make a full recovery,” said Dr. Keith Kimble, attending staff at the Cedars Sinai Pediatric Intensive Care Unit in Los Angeles.

On Friday, Ruby and her twin sister Tessa were on a playdate with close friends of the family at a pool in the Hidden Hills area of Los Angeles. Contrary to recent Internet reports, the child was not doing cartwheels near the pool and did not hit her head. The accident did not occur at the Fleetwoods’ home.

Fleetwood’s wife Lynn said that Ruby is an extremely strong swimmer. The family said she was doing somersaults in the pool when she became disoriented, and they believe she must have swallowed a high quantity of water.

She became unconscious in the pool, was revived by CPR and was rushed by ambulance to West Hills Hospital, where she was stabilized. Several hours later, she was transferred to Cedars Sinai Pediatric ICU where she is currently being treated.