The second of two Ohio men has pleaded not guilty to charges related to YouTube threats against the University of Pittsburgh as it dealt with a series of bomb scares.

Brett Hudson, 26, of Hillsboro, Ohio was arraigned before a federal magistrate in Pittsburgh on Thursday. He's charged along with Alexander Waterland, 24, with posting the online threats in April and May.

Investigators said Hudson and Waterland, of Loveland, Ohio claimed to be members of the hacking group Anonymous who had obtained confidential information they would release if the school's chancellor didn't apologize for not safeguarding its data.

Waterland has also pleaded not guilty.

Neither man is charged in connection with the bomb threats. Adam Stuart Busby, of Dublin, Ireland, is charged with sending 17 emailed threats to the university.

Related Story:Ohio man pleads not guilty to Pitt threat charges