A nine-year-old boy has been airlifted to hospital after two school buses crashed at Albion Park south of Sydney on Tuesday afternoon.
NSW Police confirmed the buses were carrying about 40 students of different ages from a local private school, which has since been identified as Illawarra Christian School.
Five students with fractures and bruises were taken to Woollongong Hospital, where the nine-year-old remains in a serious condition.
On Tuesday evening, Illawarra Christian School confirmed the incident on the school's website.
"This afternoon a number of Illawarra Christian School Tongarra Campus students were affected when two Premier Illawarra buses were involved in an accident on Tongarra Rd," the statement read.
"The school was notified immediately and the Principal, Dr Kate Bertram and a team of support staff attended the scene.
Principal Bertram wrote "at this stage I can confirm that two students have been airlifted to Sydney hospitals and a number of others transported by ambulance for local treatment."
"We are taking every precaution to ensure each child is appropriately cared for."
The school confirmed all parents had been notified and counselling would be available at the school on Wednesday.
A number of students were treated by emergency services at the scene and police are investigating the cause of the incident.
Both bus drivers have been taken to Shellharbour Hospital for mandatory blood and urine testing.