DALLAS -- Two people are dead and third is injured after a SUV crashed into a building in Northeast Dallas.

At about 9:30 p.m. Monday, police said a 1999 Mercedes SUV was being driven on Northwest Highway when the driver "failed to drive in a single lane." The driver veered to the right, leaving the roadway and crashing into a Public Storage Company near Garland Road and Interstate 635.

As the SUV crashed into the building, it caught fire. The driver and front passenger were killed at the scene.

A passerby rescued a man from the backseat, and he was taken to Parkland Memorial Hospital by emergency crews.

He's currently in critical condition, police said, with fractures to both legs and arms. He also has third and fourth degree burns to 70 percent of his body.

The names of the victims who were killed haven't been released pending notification of kin.

Police are still investigating what caused the driver to crash.