A further three teenagers have been charged over an alleged robbery in southern Queensland left a disabled man fighting for life in hospital.
The boys - aged 17, 16 and 15 - were arrested over the alleged attack and robbery of a 75-year-old man in Toowoomba on Monday.
The 17-year-old boy has been charged with armed robbery with violence, grievous bodily harm and unlawful use of a motor vehicle.
The 16-year-old boy has been charged with armed robbery and grievous bodily harm.
The 15-year-old boy has been charged with burglary, enter dwelling and commit, stealing and two counts of unlawful use of a motor vehicle.
It comes after an 18-year-old man and 16-year-old boy were arrested and charged over the incident, with police alleging they fled the scene in a stolen vehicle.
Police say their alleged victim, who has an impairment, was waiting at a taxi rank about 5pm when he was struck from behind, causing him to fall before having his backpack stolen.
The man sustained serious head injuries and was transported to hospital, where he remains in a critical condition.
The 18-year-old appeared in Toowoomba Magistrates Court on Tuesday and was denied bail.
The remaining suspects are all expected to appear before Toowoomba Childrens Court.
A 13-year-old boy was also arrested and charged in relation to an unrelated robbery investigation and several other offences.