A young teenager was behind the wheel in the latest car fatality in Queensland, adding to a horror week on the roads.

A 14-year-old boy was killed when the car he was a passenger in went through a red light in Brisbane’s north on Wednesday afternoon.

It followed the death of a mother and her four children in a fiery head-on collision near Kingaroy.

Only days later, a 62-year-old died near that location after colliding with a prime mover towing a trailer.

Police say the 14-year-old Maleny boy killed on Wednesday at Rothwell was a front-seat passenger and died at the scene.

The alleged driver of the vehicle, a 14-year-old Waterford West boy, suffered critical injuries and was taken to Queensland Children’s Hospital.

Four other girls in the vehicle, aged 10, 13, 14 and 16, also sustained injuries – one of them critical. They were taken to hospital.

The 26-year-old woman driver of the struck vehicle escaped serious injury. Her four children, who were in the car with her, were also uninjured.

Meanwhile police are appealing for any witnesses to the devastating crash that claimed the lives of Charmaine Harris McLeod, 35, and her children Aaleyn, 6, Matilda, 5, Wyatt, 4, and Zaidok, 2.

Forensic testing was underway on Wednesday to formally identify the family.

Ms McLeod and three of the children died at the scene. One of the girls was pulled from the car alive but died on a rescue flight bound for Brisbane.

The truck driver was also injured but managed to free himself as the blaze spread to the surrounding grass.

Police say Ms McLeod was trying to overtake when her car slammed into the truck, which was travelling in the opposite direction.

They’ve also called for any dashcam footage to help them piece together exactly what happened.

-with AAP