The controversy continues regarding Mexican military helicopters crossing into deep south Texas.
Area residents and local law enforcement officials have documented at least two Mexican Navy helicopter incursions military incursions in Starr and Zapata Counties.
Action 4 News filed an open records request for radar images for the first helicopter incursion.
The Federal Aviation Administration (FAA) told Action 4 News that there was no match to the incursion in any of its radar systems.
An agency spokesman said the helicopter was flying in a rural area and may have been flying too low for the FAA's radar.
Federal law enforcement keep separate radar systems to monitor drug trafficking and other activity.
Action 4 News is still waiting to hear back from those agencies to see if their radar systems were able to detect either incursion.
In the meantime, Zapata County Sheriff Sigifredo Gonzalez said he's been told the incursions were not captured on any radar system.
Gonzalez told Action 4 News that he's very concerned that the helicopter incursions were not detected or if they were, that local law enforcement officials weren't notified.
The Zapata County sheriff said foreign aircraft should not be able to be to fly in American airspace without being detected.
What does it tell you about the defense of the country, Gonzalez said. Anybody can just fly into the United States.
Both federal and state officials have told Action 4 News in previous interviews that are aware of the incursions.
Texas Gov. Rick Perry recently issued a stern statement following the Starr County incursion.
After the Zapata County incusion, Perry stated the incident is being investigated by the Texas Department of Public Safety.
Action 4 News put in a request for information with the Mexican Navy headquarters in Mexico City but has not received a reply.