Three women, two of them sisters, from Peñitas, a small border city in Texas near McAllen, are missing in Mexico after they crossed the border last month to sell clothes at a flea market, according to U.S. authorities.

The women haven’t been heard from in about two weeks, and their disappearance has garnered relatively little publicity, unlike the abduction of four Americans on a road trip to Mexico for plastic surgery. The latter received an avalanche of attention and was resolved in a matter of days.

According to U.S. Customs and Border Protection, the three women crossed into Mexico on February 24th and were traveling in a green mid-1990s Chevy Silverado to a flea market in Montemorelos, in Nuevo Leon state. The husband of one of the women spoke to her by phone while she was traveling in Mexico, but grew concerned when he couldn’t reach her afterward. The three women haven’t been heard from since, and Mexican authorities are investigating their disappearance.

Mexican authorities have been investigating the disappearance of the women since Monday, and their families have been in touch with the authorities. For most of the 112,000 Mexicans missing nationwide, the only ones looking for them are their desperate relatives, and authorities lack manpower, equipment, and training.