The lockdown was lifted after police determined that the early morning threat was "non-viable," the TV station reported.
The sexual assault case involves two 16-year-old football players at Steubenville High School who face trial in February on charges of raping and kidnapping a 16-year-old West Virginia girl last August.
The case drew national attention -- particularly on social media sites -- after a video surfaced showing the defendants laughing about the alleged assault.