By Jim Malewitz and Edgar Walters

The Texas Tribune-

FBI and IRS agents raided the San Antonio law offices of state Sen. Carlos Uresti on Thursday morning — confiscating documents and other items.

A law enforcement source told the the San Antonio Express-News, which first reported the raid Thursday, that it was connected to Uresti’s involvement with a now-bankrupt fracking sand company that he held a financial stake in.

“Law enforcement agents with IRS and FBI are lawfully present conducting a law enforcement operation," FBI spokeswoman Michelle Lee told the Texas Tribune.  "No further details have been released at this time.”