Authorities in Texas are investigating an incident that left two people dead and another seriously injured on Saturday after an oversized piece of equipment came off a trailer and landed on top of a vehicle, trapping them inside.

According to Temple Fire and Rescue, just before 11:30 a.m. on Saturday, first responders were dispatched to a report of a collision on State Highway 36, just west of Highway 317.

Upon arrival, crews said they found an oversized load had come off of its trailer, pinning a vehicle beneath.

Officials estimated the equipment being hauled by the transport fleet was approximately 350,000 pounds. Authorities did not specify what the giant piece of was.

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Two people are dead after an oversized piece of equipment came off a trailer and landed on top of a vehicle, according to Temple fire officials. (Temple Fire & Rescue)

Authorities said three people were trapped inside the vehicle.

Officials said two passengers sustained fatal injuries and the third victim was extricated and flown to the ER with life-threatening injuries.

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Authorities are investigating after an oversized load came off its trailer, causing the death of two people and leaving one person injured Saturday morning in Temple, Texas. (Temple Fire & Rescue)

Extrication took just over four hours to safely remove the driver from the vehicle, officials said.

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Officials said the load being hauled by the transport fleet was approximately 350,000 pounds. (Temple Fire & Rescue)

Temple Fire and Rescue added that ten units and 25 personnel responded to the collision to assist.

Officials said the cause of the collision is still under investigation.

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The identities of the victims have not been released.