On September 4, 2002, Raul's brother Roberto noticed an anomaly in the sky above Monterrey and began to photograph the object, as depicted in these pictures.  He saw two UFOs at once, as shown in the second photograph which was photographed from Roberto's home in the north-central part of the city.  The more distant object (coded UFO-2) appears to be traveling over Las Mitras Mountain.  Shortly after the sighting, Raul also received a telephone call from Mr. Jeronimo Flores (a personal friend and fellow UFO researcher) who had also seen the same UFO activity over the city.