Law enforcement officials and city leaders from across the Rio Grande Valley are preparing for what they say could result in tense moments or violence.
Officials say they received word that members of a militia are threatening to block ports of entry.
In Starr County, international bridge authorities met with Customs and Border Protection officials Thursday. Their goal was to discuss the potential problem and find a plan of action.
Starr County has international bridges in Rio Grande City, Roma and Falcon Dam.