Did Los Zetas take over 2 ranches in Texas?

I am doubtful of the reliability of these stories....
First one reported this "The bloodbath continues along our southern border and now word is coming in that Los Zetas, the highly trained killers formerly with the Gulf Cartel, have crossed into the United States and taken over at least two ranches in the Laredo, Texas area. I am receiving word that the owners of the ranches have evacuated without being harmed. The source is law enforcement in the area"

It is all over the net, but that doesn't make it true
The Houston Chronicle is reporting fighting just across the border
Kimberly Dvorak is reporting it too. She states she has 2 sources in the Laredo PD.
Left Coast Reb has a map.

Local law enforcement was bombarded with calls from across the country Saturday asking about a report that the Zetas had taken over two ranches off Mines Road, according to the Laredo Morning Times

But officials with the Laredo Police Department, Webb County Sheriff’s Department and Border Patrol said they knew nothing about such an incident, while Erik Vasys, an FBI spokesman in San Antonio, said the agency does not comment on rumors.

The report, which spread like wildfire among blogs Saturday afternoon, appears to have initially been posted on a blog called Diggers Realm.

The blogger wrote that he got a tip from a San Diego, Calif., minuteman named Jeff Schwilk, who said that the Zetas, former enforcers of the Gulf Cartel, had crossed into the United States and taken over two ranches off Mines Road, about 10 miles northwest of Interstate 35.