This is from the Falcon Lake Tackle website, which, by the way is one of the best around.
February 25, 2010: Hey Folks.. Consider this a Public Service Announcement. There is a lot of unrest in the Mexican towns just across the border from us right now. I hear that the towns of Mier, and Nuevo Guerrero have had some major gun battles in the streets the last week or so, and as recently as yesterday. We hear that there have been a lot of folks killed. Of course Nuevo Guerrero is the town on the south bank of the Salanaias, just across the lake from the state park area. You're all grown boys and girls, so you can make your own decisions. But it might be prudent to avoid areas where you are more likely to run into any trouble. And I would think that populated areas would be the most likely areas where that could occur.
I am sure you have heard something about all this on the news, especially if you live in South Texas. As for me, I'm fishing the Texas side for a while. I'll keep my ear to the ground for more details and let you know what I hear.. And hopefully this will settle down very soon.