Naco Border Patrol agents were pinned down by automatic weapon fire from cowardly assailants in Mexico on Tuesday, February 18th. The agents, who were pinned down for 5 to 7 minutes, were not injured and were unable to return fire. The shooting took place in broad daylight and the shooters knew exactly who they were shooting at. After the assailants left the area, they fired on other Border Patrol agents nearby. Hundreds of shell casings were reportedly scattered about area after the shootings. More to follow.