Bryan Titsworth / WFAA-TV

The fiery wreck shut down LBJ Freeway early Sunday morning.

DALLAS — LBJ Freeway was shut down in both directions near Plano Road after a fiery and fatal crash Sunday morning.

Three vehicles — includng an 18-wheeler and a pickup truck — collided in the eastbound lanes of of the highway just east of Plano Road at 7:35 a.m.

All three vehicles caught fire. Two drivers were taken to Parkland Memorial Hospital for treatment.

Then, in a separate accident at the same location, a pedestrian in the westbound lanes of LBJ was struck and killed after getting out of the car, perhaps to offer help in connection with the first accident.

A representative of the Dallas County Medical Examiner's officer was dispatched to the scene.

There were still massive backups on LBJ Freeway on Sunday afternoon, more than six hours after the incident.