UPDATE 12:26 p.m. EST: According to The Hill reporter Rebecca Shabad, the child pornography investigation is not being handled by the FBI.

Original Story:

Ryan Loskarn, the chief of staff to U.S. Sen. Lamar Alexander, R-Tenn., is under investigation on child pornography allegations, prompting the influential senator to put Loskarn on administrative leave without pay.

“I was just informed by the United States Senate legal counsel’s office that law enforcement agents are conducting a search of the personal residence of Ryan Loskarn, the chief of staff of my Washington, D.C., office regarding allegations involving child pornography,” Alexander said in a statement posted to his website. “I am stunned, surprised and disappointed by what I have learned. Based on this information, I immediately placed Mr. Loskarn on administrative leave without pay. The office is fully cooperating with the investigation.”

According to legistorm.com, Loskarn was hired as Alexander's chief of staff in October 2012 with a salary of more than $70,000. He received a raise in April to just under $84,500.