Rio Grande City, Texas, on Friday as a helicopter along the southern border crashed

A tragic incident unfolded near Rio Grande City, Texas, on Friday as a helicopter conducting a mission along the southern border crashed, resulting in the loss of two National Guard soldiers and one Border Patrol agent.

The Associated Press (AP) reported Friday that a fourth soldier, who was aboard during the crash, sustained injuries and was later listed in critical condition. Officials are currently investigating the cause of the crash. (Video)