Weeks after its former pitchman Jared Fogle was charged with child pornography charges, sandwich retailer Subway acknowledged that it had received one “serious” complaint against Fogle several years ago.

In a statement, Subway said that it had completed an internal investigation that found the complaint against Fogle, which was submitted to the company’s Web site in 2011.

Subway described the complaint as “serious” but said it did not imply “anything about sexual behavior or criminal activity” involving Fogle. A spokeswoman for the company, Kristen McMahon, confirmed to The Washington Post that the complaint was submitted by a former Florida journalist, Rochelle Herman-Walrond, who after Fogle’s arrest claimed that she had worked with the FBI to investigate Fogle after he talked to her about having sex with minors.

Subway apologized for not escalating or acting on the complaint.

Last month, Fogle admitted to federal charges that he paid for sex with minors and received and distributed child pornography.

The investigation uncovered years of misconduct dating back to 2007 and ending as late as June 2015. During that time, Fogle admitted to soliciting and paying for sex with minors and receiving child pornography from his friend and former head of his childhood obesity charity Russell Taylor.

Taylor has also been charged with and has pleaded guilty to child pornography charges.

After federal agents raided Fogle’s Indiana home in July, Subway announced that the company and Fogle had mutually agreed to “suspend” their relationship.

In its internal investigation, Subway said that it reviewed more than one million comments submitted to the customer relations team and also reviewed all documents and interviews with past and present company and Franchisee Advertising Fund employees and management.

Subway said that nothing hinted at the charges Fogle would later face.

“The harm he caused so many is inexcusable, and we continue to extend sympathies to his victims and their families,” Subway said Friday. “It is important to note that the investigation found no further evidence of any other complaints of any kind regarding Mr. Fogle that were submitted to or shared with SUBWAY.”

In media interviews, Herman-Walrond said she recorded years of conversations with Fogle for the FBI.

“He had a lot of these sexual fantasies with children,” she told WFLA. “He categorically listed ways that he would develop relationships with children and entice them to do sexual things with him.”

A spokesman for the U.S. attorney’s office in Indiana, Tim Horty told The Post that investigators received information from Herman-Walrond, but “it did not lead to the arrest of Jared Fogle or his co-conspirator Russell Taylor.”