SOUTH ORANGE, NJ - An arrest warrant has been issued for the person responsible for Thursday’s bomb threat at Seton Hall University's South Orange Campus, according to South Orange Police Chief James Chelel and Acting Essex County Prosecutor Carolyn Murray.

The arrest warrant for Third Degree Terrorist Threats was issued against Dennis Mamrosz, 24, of Yonkers, N.Y.  Bail was set at $20,000. Mamrosz was a student at Seton Hall University until 2010 but did not graduate.

Mamrosz is currently in the Westchester County Jail in New York on unrelated charges. He was not in jail at the time of the bomb threat and will be extradited when his unrelated charges are resolved.

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On Thursday, the South Orange Police Department had received a copy of a threatening email from a tipster.  Campus was evacuated while the Essex County Sheriff’s Department K-9 Unit spent hours inspecting.  Essex County Sheriff Armando Fontoura said that the search revealed no bombs or explosives on campus.

The investigation is continuing jointly by the South Orange Police Department and the Essex County Prosecutor’s Cyber and Major Crimes Units.

Murray commended the investigators from her office and the South Orange Police Department.  She said that all cyber-threats will be investigated to the fullest, and notes that this charge is an accusation, and all parties are innocent until proven guilty.