COLUMBIA, Mo. » A college student in Rolla, Mo., made online threats toward the University of Missouri in Columbia in part by mimicking the wording used by a gunman who killed nine people at an Oregon college, police allege in court papers released Thursday.

No one was hurt on the Mizzou campus, but the man making the alleged threats admitted to police he had a “deep interest” in the Oregon shooter, court records say.

The suspect, Hunter M. Park, 19, of Lake Saint Louis, appeared on video from the Boone County Jail in Columbia on Thursday for his initial appearance in court on the charge of making a terrorist threat.

The threats posted to social media Tuesday included: “I’m going to stand my ground tomorrow and shoot every black person I see,” “Some of you are alright. Don’t go to campus tomorrow,” and “Well tomorrow Mizzou will really make national news.”

They were posted to on Yik Yak, an anonymous location-based online app.

MU Campus Police Officer Dustin Heckmaster said in a probable cause statement Wednesday that he recognized the wording in one of the threatening messages — “Some of you are alright. Don’t go to campus tomorrow” — as the same wording from a posting tied to Chris Harper-Mercer, the man who opened fire Oct. 1 at the Umpqua Community College in rural Oregon.

University police said in court documents that they traced the threats to Park through Yik Yak and AT&T.

When officers arrived at Park’s dorm room early Wednesday, he invited them in and confessed, Heckmaster said.

Park told Heckmaster he didn’t know why he posted about shooting black people, court records say.

He indicated that some of his language had been quoting the Umpqua shooter and said he had a “deep interest” in the incident, the records say.

Authorities said no weapons connected to Park were found.

Park is a 2014 graduate of Wentzville Holt High School in Wentzville, Mo. He is a sophomore majoring in computer science at Missouri University of Science & Technology at Rolla, said Mary Helen Stoltz, manager of external relations there.

In court documents made public Thursday, prosecutors say he committed a felony that would be punishable by up to seven years in prison.

Park did not enter a plea Thursday, but his Columbia-based attorney, Jeffrey Hilbrenner, argued to Judge Kimberly Shaw for a $10,000 bail. He was being held in the Boone County Jail.

Park’s attorney, Jeffrey Hilbrenner, said Park has medical issues that he said could be exacerbated in jail. He did not describe the medical issues. Hilbrenner said Park has excelled academically and has no criminal record. He didn’t have the means to carry out any attack, Hilbrenner said.

Andrea Hayes, assistant prosecuting attorney for Boone County, argued that Park should be held without bail.

“Threats were made to the community, and we believe he is a danger,” she told Shaw.

Shaw denied Hilbrenner’s motion for bail reduction, but ordered a bail investigation, which could result in a change to Park’s bail. Park’s next court date was scheduled for Nov. 18.

The threats came amid tumult and protest on the Mizzou campus. Some black students at have said they feel unsafe. A graduate student went on a hunger strike, and more than 30 members of the Missouri football team joined in the protest.

On Monday, University of Missouri System President Timothy M. Wolfe resigned, and the Columbia campus chancellor, R. Bowen Loftin, was forced to step down.

Threats and rumors began circulating widely on Tuesday night. Police say they are investigating several social media posts, including a tweet from a woman reportedly saying “black students should stop protesting and start killing.”

A freshman at Northwest Missouri State University was charged Thursday with two counts of making a terrorist threat for posts saying he wanted to “shoot up” a dorm there and that he was going to “shoot any black ppl tomorrow.”

Connor B. Stottlemyre, 19, of Blue Springs, Mo., faces one felony and one misdemeanor count. Police said they weren’t sure if the threats were linked to the situation at Mizzou.

Later Thursday, prosecutors charged a third man with posting online threats to attack a college campus.

Tyler Bradenberg, 19, of Mehlville, Mo., was charged Thursday with a felony count of making a terrorist threat. A Rolla detective said Bradenberg admitted he posted the threat. An arrest warrant has been issued for him.

Authorities say Bradenberg posted “I’m gonna shoot up this school” on the anonymous messaging app Yik Yak on Wednesday.

It was apparently aimed at the Missouri University of Science & Technology, where he studied chemical engineering for a semester last fall.

Bradenberg’s father, Paul Bradenberg, told the Post-Dispatch he thinks his son copied someone else’s message and posted it on Yik Yak but had no intent to hurt anyone. He said his son does not own guns.

“Yik Yak is basically a bathroom stall,” he said. “It’s a misunderstanding. He’s a smart kid and he just texted something in a split second without thinking of what he is doing, and he deleted it immediately. And now he’s being charged with a felony. It’s absurd. It’s a complete empty threat, and they’ve taken it too far.”

Campus police at Mizzou, meanwhile, were investigating the vandalism of a sign at the black culture center on the Columbia campus.

MU police Maj. Brian Weimer said someone spray-painted over part of a sign on the MU Gaines/Oldham Black Culture Center. The Maneater, a student paper, reported the word “Black” was covered over on the sign that reads “Black Culture Center.”

Weimer said it happened at 12:48 a.m. Thursday. Police are reviewing video surveillance.

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(Staff writer Joel Currier and special correspondent Jack Suntrup contributed to this report.)