It's good to put blind speculation in a news article and present it to the world as fact. No big deal.
MCALLEN, Texas (Reuters) - U.S. Border Patrol agents found a rocket launcher, assault rifles and explosives near the Rio Grande river in Texas, the agency said on Wednesday, a discovery that suggests a link to Mexico's drug wars.
Officials theorized that the guns were waiting to be smuggled across the border into Mexico, but said that was just speculation.
So a cache of weapons including grenade launchers, rocket launchers, and C-4 explosives were "intended to go South" based on aforementioned speculation and past cases? Whatever. No doubt these items were bought at the local gunshow for next to nothing with no background check.
If these weapons weren't being transported North by cartel members who got them from the Mexican government, then they had to have been provided by a US government entity that has the ability to acquire them. Wonder who that could be.