After a daylong investigation, Frostburg State University Police and the Allegany County Combined Criminal Investigation Unit made an arrest Wednesday in connection with a threat made via Yik Yak, a popular new anonymous social media app.

University police were alerted to the posting, which stated that "at 5:30 tomorrow, I'm going to start shooting." Based on the timing of the post, "tomorrow" was believed to be Wednesday, April 30, according to a Frostburg alert.

The suspect, who has not been identified, told investigators that the threat was "made as a joke," according to a Frostburg news release. Police determined that the suspect did not have the means to carry out the threat.

Liz Medcalf, a university spokeswoman, said the threat was not specific to the school, but Frostburg officials sent out an alert in the interest of being cautious since they knew the threat came from a local source. According to its website, Yik Yak, which launched in December, operates as a virtual bulletin board that shows anonymous posts from users in the area.

The school did not close as a result of the threat. However, students and employees did have leeway to leave campus if they chose.

"Frostburg State University expresses its profound gratitude to the police agencies who stepped up to assist us in resolving this case," Jonathan Gibralter, university president, said in the release.

Yik Yak has received extensive negative attention in recent weeks for being used to bully and issue threats at schools.

nadavis@baltsun.com