Jong Seong Shim, who admitted to sending an anonymous shooting threat on Yik Yak, was arraigned today in Bellefonte and is now being held on $100,000 bail at the Centre County Correctional Facility.

Shim, a 20-year old Penn State sophomore studying engineering at University Park from Tinton Falls, N.J., is charged with misdemeanor counts of terroristic threats and disorderly conduct. Shim admitted to posting the Yak, in which he said he would “kill everyone” at Penn State’s main campus, on Oct. 11. He told police it was a “prank.”

Penn State Police Chief Tyrone Parham, who addressed the media in a press conference near the Eisenhower Parking Deck today, said police have maintained an increased presence in the HUB all day because of a “sense of unease around campus.”

Police were first notified of the threat by a Penn State student who called their office at 9:15 a.m. Sunday. Parham said within the next 12 hours, they were knocking on Shim’s door at 201 Vairo Boulevard. A search of Shim’s house turned up no weapons, and police could not comment on whether he had any registered. The FBI was notified of the threat, but it was handled by Penn State Police. Penn State Police have dealt with threats or potentially dangerous messages on Yik Yak before, according to Parham, but none were this serious.

Shim’s status as a student is “in the works,” Parham said.

“We are grateful to our very alert and diligent students who first discovered this threat and raised their concerns with police,” said Steve Shelow, Penn State’s assistant vice president for Police and Public Safety. “It is quick reporting by observers and strong cooperation among law enforcement agencies that allowed us to move swiftly to identify and apprehend the suspect.”

Shim was arraigned in front of Magisterial District Judge Thomas Jordan. His next hearing is scheduled for  8:30 a.m. on Oct. 22 at the Centre County Courthouse in Bellefonte.