Brett John Jackson did not apply for bail

A man who allegedly carjacked a teenage girl following a test drive in Brisbane is accused of pushing her out of the moving vehicle.

A boy who tried to rescue his teen sister from an alleged carjacking in Brisbane was dragged along the ground, police allege.

Police will allege Brett John Jackson, 24, responded to an online advertisement for a car being sold in Taringa on May 1.

Police will allege that after taking the car for a test drive Jackson pulled a knife on the 17-year-old girl in the passenger’s seat.

Brett John Jackson, of Eight Mile Plains, did not apply for bail.

The girl’s 13-year-old-brother then jumped in the car to help her but got dragged as it took off, police will allege.

Moments later police will allege the girl got pushed out of the moving vehicle onto the road.

Police allege Jackson, of Eight Mile Plains, then drove from the scene along Moore St.

The two teenagers were taken to hospital for treatment.

Jackson appeared in Brisbane Magistrates Court charged with two counts each of assault occasioning bodily harm and unlawful use of a motor vehicle along with single counts of armed robbery, deprivation of liberty, dangerous driving and unlawful entry of a vehicle with intent to commit an indictable offence.

Jackson, who was on a return to warrant prison, did not apply for bail.

The matter was adjourned to May 30.