NEW YORK (AP) - A Columbia University student who campaigned at the United Nations and elsewhere against child sexual abuse has been ordered detained until trial on sex crime charges involving children.

Federal authorities accused Joel Davis of having sex with a 13-year-old boy and seeking sexual images of children as young as 2. His lawyer said Friday that the boy claimed he was an adult.

Prosecutors say Davis texted undercover agents seeking sexual images of children as young as 2.

The New York Times reported a United Nations secretary general spokesman saying Davis had attended several U.N. events and U.N. officials were "appalled" by the allegations.

In a November column for the Columbia Spectator, Davis described himself as a rape victim and discussed its effects.

Columbia calls the allegations "deeply disturbing."

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Information from: The New York Times, http://www.nytimes.com

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