There's a new twist to the cat-and-mouse game between drug traffickers and authorities south of the border in Reynosa.
Residents are now using social media and Google Maps to report drug dealers in their neighborhoods.
An anonymous group of Twitter users launched the project a few months ago but it's now surging in popularity.
In an email interviews with Action 4 News, the creators of the map said they are asking people to report drug dealers using the #reynosafollow channel of Twitter.
The map allows users to zoom in and get a street level view of where drugs are being sold.
Action 4 News spoke to Mexico's Attorney General's Office (PGR) in Reynosa about the Google Maps project.
While officials applaud residents using technology to report crime, PGR officials are asking that residents use their "Denuncia Ciudadana" system to report illegal drug activity.