A 17-year-old is facing a charge of attempted murder after he allegedly stabbed a teen of the same age on the Sunshine Coast following an ongoing dispute.
The pair got into a fight in the pedestrian underpass at Nambour train station about 5.20pm on Friday.
One of the teens was flown to Brisbane after he was stabbed in the chest, while the other was arrested at a nearby residence later that night.
Officers allegedly found a knife at the property where he was located.
Detective Senior Sergeant Phil Hurst said police were still trying to work out what caused the stabbing but the pair were known to each other.
"There was some disagreement between them leading up to this altercation," he said on Saturday.
The stabbed teen remains in a critical condition at Prince Charles Hospital.
© AAP 2018