A customer snapped a photo of an unusual sight at a convenience store in La Grulla.
The photo shows a Border Patrol agent is seen waiting at the counter with his service issued assault rifle at a Stripes store off Highway 83.
One viewer told Action 4 News that the presence of the armed agent caused alarm among customers.
Action 4 News spoke to Border Patrol officials about the incident.
Border Patrol officials said the agent is not facing disciplinary action.
Officials said the gun lock in the agent's vehicle was not working properly and that he could not leave it in the vehicle.
Border Patrol officials said the agent decided to carry the semi-automatic rifle with him inisde the store to keep it secure.