Dallas police and fire are responding to a serious crash on the Dallas North Tollway at Northwest Highway (also known as Loop 12).
Police believe a multi-car crash involving a semi-truck. Multiple injuries have been reported.
Police are just starting their investigation, and details are limited.
Dallas Fire-Rescue said the truck hit multiple vehicles and then a wall. 911 callers claim at least 6 vehicles were hit, but officials are working to verify those claims.
NBC 5 has learned two people were hospitalized and first responders remain on scene.
The 18-wheeler was carrying diesel, which has spilled, prompting a HazMat response.
The road is not closed.
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