Law enforcement officials and city leaders from across the Rio Grande Valley report that they have word that members of a militia are threatening to block ports of entry. The valley is located is the southernmost tip of South Texas.

The  militia operation, called “Secure Our Border- Laredo,” is urging members to voluntarily guard private property near the border town along the Rio Grande, where some residents have felt threatened by drug cartels and other gangs.

“This is not a ‘go-in-guns-blazing’ kind of thing,” said group spokeswoman Denice Freeman. “This will be handled with the utmost professionalism and security and safety for everyone involved.”

Officials received word that members of a militia plan to protest illegal crossings by blocking traffic on Sept. 20. Rio Grande City Mayor Ruben Villarreal said members of the group have a right to express their opinion. His is however concerned about the group's intent.

"What can we expect? I don't know. The unknown becomes an issue that we really got to prepare for," Villarreal said.

"I'm a 100 percent sure that with the National Guard, with DPS, with Border Patrol and local law enforcement, we'll communicate and we'll handle whatever comes," he said.