A Perth physiotherapist has told how bystanders performed CPR on two young brothers who were found face down at a southern suburbs beach on Thursday.
Tracey McLaren was at Port Coogee beach for a quick swim about 10.20am when she heard terrified screams from a woman in the water.
It is understood the boys, aged four and six, and their mother were on a play date with other children when another mother noticed them underwater and yelled for help.
It is believed the brothers lost their footing because the floor at the man-made beach drops off quickly.
Ms McLaren said another woman helped her pull the elder boy from the water.
His brother was assisted by another two people, believed to be a teacher and a midwife.
"Both boys were completely blue," she said. "We gave them CPR for a couple of minutes and eventually they came to.
"They vomited water but they were just so blue."
Another witness said the brothers' young friends were incredibly distraught by what they saw.
St John Ambulance took the boys to Fremantle Hospital where they were stabilised before being transferred to Princess Margaret Hospital.
Ms McLaren said the water looked calm, which could be dangerously deceptive to those who were unfamiliar with the beach.
"It's shallow, but then there's a massive drop where even my husband, who is six foot, cannot stand," she said.
Witnesses who contacted The Weekend West yesterday praised those who rushed to the boys' aid.
"The people that helped the boys and performed CPR were amazing," one wrote.
Ms McLaren said the incident was a reminder to parents to always watch their children because accidents could happen in a split second.
The younger boy is believed to be in a coma in a critical but stable condition.
His brother is stable.