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Jared Fogle, left, signs a copy of his book "Jared, The Subway Guy" for fans outside of a Subway Restaurant in New York City, on Aug. 21, 2006. On Tuesday, federal authorities confirmed that Fogle's home was the focus on a child pornography investigation, although they did not indicate whether the Subway spokesman would be charged. Reuters/Ray Stubblebine

The home of Jared Fogle, the man who rose to fame for losing weight on a Subway sandwich-only diet, is the focus of a child pornography investigation that previously ensnared his anti-childhood obesity foundation. Federal agents raided Fogle’s Zionsville, Indiana home on Tuesday morning to serve search warrants in the latest investigation, the local WTTV-TV, Indianapolis, reported.

The FBI raid, which started around 6:30 a.m. EDT Tuesday, included the use of a large evidence truck. Agents and officials of the Indiana State Police were seen parked in the driveway of Fogle’s home. But investigators wouldn’t say whether authorities intended to detain Fogle on any criminal charges.

In a statement release Tuesday afternoon, the Subway Corporation said it was "concerned" about the nature of the investigation.

Russell Taylor, the former director of The Jared Foundation, was arrested in April in a child pornography case. Authorities accused Taylor, 43, of possessing and producing child pornography and confiscated more than 500 videos depicting pornographic images of children at his home in Indianapolis. Taylor is in jail awaiting trial in the case.

In April, Fogle said the foundation severed all ties with Taylor. Subway Corporation said it had no connection to Fogle's foundation and was glad to see Fogle take quick action to distance himself from Taylor. Established as a nonprofit by Fogle in 2004, the Jared Foundation sought to raise awareness about childhood obesity by providing educational tools to parents, schools and communities.

Fogle, a 37-year-old who stands at 6 feet 2 inches tall, gained national fame in 2000 for dropping from a 62-inch waistline by eating Subway sandwiches and exercising. He was a freshman at Indiana University when he became the Subway spokesman and is reportedly worth $15 million.

Fogle, who is Jewish, married his college sweetheart, Katie McLaughlin, in August of 2010. He had a six year marriage to pediatric nurse Elizabeth Christie, before they divorced in 2007.