In spite of the ongoing presence of U.S. troops in Mexico, and a large border presence, a raid by Mexicans of some sort near Hachita, New Mexico, resulted in the deaths of at least two Americans and perhaps more (the details are hard to come by). The raid was a nighttime raid.
Hachita was used as a staging point for troops entering Mexico during the Punitive Expedition, so a raid in this location is surprising. The town, like Columbus, is a border town, although a very tiny one.