McKINNEY, Texas - Crews are working to rescue the driver of a tow truck after a crash that left the big rig dangling from an overpass.

What we know:

The crash happened on Wednesday afternoon near Highway 121 and Hardin Boulevard.

Images from SKY 4 showed McKinney firefighters with a ladder truck working to rescue someone inside. Image 1 of 4 ▼

Hwy. 121 is reportedly closed in both directions.

What we don't know:

There’s no word yet on how many vehicles were involved or if there were any injuries.

The cause of the crash is still unknown.

The Source: The information in this story is from the McKinney Police Department and SKY 4. McKinney Traffic

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