Two U.S. Customs and Border Patrol agents are in critical condition after a truck crashed into a checkpoint near Yuma on Saturday.

The crash happened at a checkpoint on I-8 between Wellton and Yuma around 4:30 p.m. Multiple agencies, including the Arizona Department of Public Safety, FBI, DHS Office of Inspector General and the CBP’s Office of Professional Responsibility, responded to the accident scene.

Arizona Department of Public Safety authorities say that a Ford F-150 truck entered the checkpoint area at a high speed and hit the back of a stationery car. The pickup then continued driving toward the checkpoint and collided with crash barriers and another vehicle, then ultimately running into the checkpoint structures which was occupied by agents.

The pickup flipped and came to rest on the driver’s side and one of its passengers was partially ejected. As a result of the accident, eight people total were taken to the local hospital and Phoenix trauma centers for medical attention.

Two injured Border Patrol agents were taken from the scene to a local hospital for treatment and were later flown to Phoenix for more advanced medical care.

As of Monday, three people are listed in critical condition, including the two agents. Officials do not believe impairment was a factor. The Arizona Department of Public Safety seized the truck. An investigation is underway as to what led to the crash.

The U.S. Border Patrol says they would like to thank all the first responders and trauma personnel who assisted in delivering lifesaving care to everyone involved and thank those for supporting their agents and families during this time.

The Border Patrol Union released the following statement:

Asking for your thoughts and prayers on behalf of two agents in critical condition after an event at a checkpoint on Interstate 8 between Wellton and Yuma, Arizona yesterday evening. We have a lot of brave agents who risk their lives every day trying to protect this nation.