UPDATE: POLICE have located the fifth teenage boy in relation to the tragic events in Maylands.
Police have confirmed he is now with family members.
The marine and land search operation in Maylands has been completed.
EARLIER: THE Coroner will be investigating following the deaths of two boys in the Swan River yesterday afternoon.
Five boys were involved in the incident and four boys entered the river.
Two of the boys were deceased when they were pulled from the water this morning.
Speaking to media today, Police Commissioner Chris Dawson said concerns are held for the fifth boy.
Commissioner Dawson said they are treating the incident as “deaths in police presence”.
“We have been liaising closely with the two families,” he said.
“They have requested police do not release identities of the two dead boys.”
Police are trying to find the family of the fifth boy who was last seen on foot on the foreshore of the Swan.
“We still do not know where that boy is,” Commissioner Dawson said.
Despite the deaths being treated as deaths in police presence, Commissioner Dawson said police did not come in contact with the two boys who disappeared into the Swan.
Commissioner Dawson said the two boys apprehended by police were provided with clothing and the attention of St John Ambulance officers.
They were then taken to a police station in the city and reunited with their families.
Commissioner Dawson said police are concerned for the welfare of the fifth boy, and for the families and loved ones of the deceased pair.
“If any member of the community has footage of what took place about 3.15pm to 3.30pm yesterday, would you please provide it to police,” he said.
“We really do want any information that can assist us in locating the fifth boy.
“We would need any footage or eyewitness account to assist us in preparing a report for the coroner.”
Commissioner Dawson said police saw the boys get into trouble and die in the water.
“The information I have is that two of the boys were recovered close to either side of the bank, one on the other side and one on the Maylands’ side,” he said.
“The two boys who tragically lost their lives, we believe (based on) police and eyewitness accounts, got into difficulty in the middle of the river.
“We are providing as much support as we can to all grieving families.
“This is a tragedy – we share and offer our condolences.”
Initially, two officers were involved in the search for the boys but they were joined by TRG officers who happened to be nearby.
“Our message to both the (fifth boy) and his family or associates (is) we just want to know if he is safe,” Commissioner Dawson said.
“We are extensively looking for his family and people connected with him but we are concerned for his welfare.
“The loss of any young life is an absolute tragedy, this is why I have emphasised that police are primarily here to establish the welfare and whereabouts of the fifth youth.”
Commissioner Dawson said that conditions yesterday were not ideal in terms of weather.
“As I understand, the police on the scene were able to observe four boys in the water, two of whom were able to be brought back to shore,” he said.
“The police were physically unable to get to both young boys before they succumbed to the river.
“We are still in a recovery/search mode for the fifth boy.
“We will conduct the search (for) as long as we can (and) until we locate where the fifth boy is, we will continue to search.”
The boys who were taken into police custody were not charged with anything.