A resident of Dublin, Ireland—Adam Stuart Busby, 64—is facing more than two dozen charges in connection with a rash of bomb threats at the University of Pittsburgh in the closing weeks of this past spring semester.

A federal grand jury returned two indictments on Wednesday against Busby. He is charged with emailing bomb threats targeting the university, three federal courthouses and a federal officer.

A separate four-count indictment charges Busby with, on June 20 and 21, maliciously conveying false information through the Internet claiming that bombs had been placed at federal courthouses in Pittsburgh, Erie and Johnstown.

Busby was also charged with threatening U.S. Attorney David J. Hickton as he performed duties in his official capacity.

Busby is in custody in Ireland on unrelated charges.

Hickton would not speculate on a motive.

"Busby does not have a connection to Pittsburgh or the university community," Hickton said. 

Federal authorities also charged Brett Hudson, 26, of Hillsboro, OH, and Alexander Waterland, 24, of Loveland, OH, with engaging in a conspiracy against the University of Pittsburgh, using interstate threats claiming that they were associates of the computer hacking group Anonymous.

University President Mark Nordenberg conceded that the "bomb threats may have hampered the recruitment of students."

This article originally appeared on the NorthHills Patch.

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