A Long Island man was arrested Thursday and charged with sexually exploiting a girl over the Internet for years, starting when she was 11, federal authorities said.

Hassan Khan, 28, was arrested and charged in five counts with illegal sexual activity involving the girl, starting in 2007 and ending in 2013, according to Preet Bharara, the U.S. attorney for the Southern District of New York in Manhattan, and Diego Rodriguez, assistant director-in-charge of the New York office of the FBI.

"Khan was arrested today for allegedly targeting, grooming and exploiting a minor for several years," Bharara said in a statement Thursday night. "He carried out this illicit behavior by enticing her online and engaging in sexually explicit conduct with her, both in the United States and abroad. As this terrifying ordeal comes to an end, the nightmare continues for the victim and her family."

According to the complaint, Khan met the girl, who lives abroad, in the chat room of an online game in October 2007, and the two began communicating, soon chatting and emailing on several online platforms. The complaint says in 2008 the girl got access to a webcam, and Khan began asking her to remove her clothing and show him parts of her body.

In April 2012, when the victim was 15, Khan visited her and the two had sex, according to the complaint.

In October 2013, Khan emailed the girl and wrote, "I think you should delete all my emails and thousands of [Facebook] messages and throw away my letters," the complaint alleged.

A search warrant at Khan's home was executed Thursday, officials said. At that time, Khan waived his Miranda rights and agreed to speak to authorities, confirming he had sex with the girl and that he knew she was a minor.

According to prosecutors, Khan is charged with coercing and enticing a minor to engage in illegal sexual activity, sexual exploitation of a child, sexual exploitation of a child outside the United States, and receipt of child pornography.

Prosecutors did not say where on Long Island Khan lives, though he apparently used to reside in Yonkers, according to the complaint. Information on Khan's attorney also was not available Thursday night.

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Officials said anyone who may have information concerning Khan that is relevant to the investigation should call the FBI at 212-384-1000.