The Morris County Prosecutors office is now involved in the search for 22-year-old Drew University student Ajay Sah.
Police say the last time anyone heard from Sah was Tuesday, January 19.
Sah is a foreign exchange student from Nepal who is currently attending Drew University in Madison.
Authorities say he was last seen at the Newark Broad Street Station and boarded a train heading to New York Penn Station shortly after midnight on January 20.
Police are asking anyone with information about his disappearance to come forward.
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