Overview
- Environmental group Conibio Global reported that people arriving by boat from the United States placed warning notices on the Mexican side of La Boca del Río in Matamoros.
- The signs referenced U.S. Department of Defense authority, warned of possible detention and searches, and invoked Section 21 of the 1950 Internal Security Act while prohibiting photography and mapping.
- Mexico’s Navy documented the postings and later removed them, with authorities reporting the takedown of six notices installed on Mexican territory.
- Mexico’s Foreign Ministry said it has opened communication with the U.S. Embassy, and the Mexican Section of the International Boundary and Water Commission will conduct technical consultations to clarify the episode.
- Residents reported similar notices appearing on both sides of the river mouth, local groups voiced concern about access and fishing, and Conibio Global called for a formal investigation and public explanation.