Seven children were hospitalised when a concrete pontoon flipped at a scout camp north of Brisbane.
A dozen children who plunged into a dam when a concrete pontoon overturned and landed on them at a scout camp on Tuesday evening are lucky to be alive, a paramedic who treated them said.
Seven children aged between 11 and 15 were hospitalised, mainly with neck, shoulder and spinal injuries, after the pontoon flipped at Baden-Powell Park in Samford, north of Brisbane, about 6.15pm.
The children were staying at the Scout-owned facility as part of a military-style bootcamp for troubled youth, Scouts Queensland said.
They are not members of the Scout movement.
Queensland Ambulance Service senior operations supervisor Brad Hardy praised a teenage lifeguard for his quick actions in rescuing the 12 children from the water and administering first aid to the injured before paramedics arrived.
"They are extremely lucky. It was a three metre by three metre concrete pontoon, all kids apparently got onto one side and it overturned, they fell into the water and the concrete pontoon came down onto their heads," he said.
"This had very high potential for significant injury and possible drowning, but he accounted for all the kids in the water, helped them all to safety and did an amazing job.
"It was very well done on his behalf."
In a statement on Wednesday morning, Scouts Queensland said the youths were staying at Baden-Powell park to take part in a boot camp run by an organisation named Veterans for Youth.
"An organisation called "Veterans For Youth" has rented the facility to run a boot camp for a small group of young people," it said.
"The organisation helps troubled youth to develop into responsible, confident young adults and develop their leadership potential.
"We have requested details from V4Y today and are undertaking further investigations into the matter."
Eight of the 12 children were injured in the incident and seven taken to hospital in six ambulances, Mr Hardy said.
He said the hospitalisations were mostly precautionary, as all were taken in stable condition suffering minor injuries.
Injuries were largely necks, chest, shoulder and spinal, due to the weight of the concrete pontoon landing on their heads, Mr Hardy said.
"It's an isolated post and we had a lot of ambulance resources out there," he said.
"We transported seven of the children in six ambulance units, we also had intensive care paramedics and first responders from Sanford also responded.
"There have been incidences over the holiday break but this is the most significant one, luckily it was very well organised and they had safety precautions in place."