Federal agents on Thursday arrested a student at Long Island University’s Brookville campus and charged him in federal court in Manhattan with sexually exploiting minors over the Internet.

Robert J. Garneau, 21, of Warwick, using screen names such as Raptorr427 and BobbySixx, manipulated a 12-year-old in California into sending him sexually explicit pictures, and did the same thing twice more in 2015, authorities said.

In an interview at his college dorm this year, agents alleged, Garneau admitted that he got naked pictures from children he met gaming online, and told them his dad worked for the FBI to scare them into doing what he wanted.

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Garneau was scheduled to appear in court in White Plains on Thursday afternoon. He faces three counts of sexual exploitation of a minor, each carrying a minimum sentence of 15 years in prison, the government said.

“The University cooperated with police, who assured us there is no threat to the community,” said an LIU spokeswoman. “The safety and welfare of all students is always our #1 priority.”