LOUISVILLE, Ky. (FOX 56) — A Louisville man has been indicted after an undercover operation, focused on child sexual exploitation.

The United States Attorney’s Office said “Operation Angel,” has resulted in the arrest of four men from Louisville. Justin Aubrey, 26, Steven Earnest, 35, Kevin O’Donnell, 26, and Alexander Young, 26, were all arrested during the investigation.

Aubrey and Earnest were initially charged with attempted sex trafficking of children on March 15, 2023. According to a news release, Earnest was charged with attempted online enticement, and O’Donnell, and Young were charged with attempted online enticement earlier on Feb. 22, 2023.

On Tuesday, a new and additional indictment was returned against Young for online enticement, transfer of obscene material to a minor, and production of child pornography. The attorney’s office said the latest indictment alleges in December 2022, Young met a girl, under the age of 16, online. He communicated with her and persuaded her to engage in sexual activity, including the production of sexually explicit images which she sent to him. Young also sent sexually explicit images of himself to the girl.

According to a news release, earlier indictments charged Aubrey and Earnest after they negotiated to pay for sex with children under the age of 14 and showed up, with the money. O’Donnell and Young were charged after showing up to engage in sexual activity with minors under the age of 16.

The office said law enforcement officials were acting in online, undercover roles for those events.