PHILADELPHIA – A wealthy Russian-American entrepreneur is due in court Thursday for a plea hearing in an international child-sex case.

U.S. prosecutors in Philadelphia say Andrew Mogilyansky traveled to Russian orphanages to molest young teenage girls and hire them out as prostitutes.

The case stems from a related investigation in Russia that led to several 2006 convictions.

Then 38-year-old multimillionaire now lives in suburban Philadelphia.

Prosecutors say they are also investigating a Mogilyansky-run charity for victims of a 2004 school massacre in Beslan, Russia.