Officials launched a lockdown at the University of Alabama Sunday night after someone made an anonymous threat against residents in an all-female dorm and members of Greek fraternities and sororities.

Using the pseudonym "Authur Pendragon," someone sent threats of gun violence via YouTube over the weekend targeting students living at Tutwiler Hall, a residence hall that houses 966 women at the Tuscaloosa campus, along with students involved in Greek life, according to the Crimson White.

The threat then spread via social media.

Once University of Alabama police learned of the threat of possible armed individuals at Tutwiler, they launched a 45 minute lockdown around 11:00 p.m. Sunday and search the dorm.

After the search, the University sent out an email revealing that "no weapons or unauthorized persons" were found, reports WXIA-TV.

The lockdown was then lifted and students were allowed to return to their rooms around midnight.

Officials said the information provided to the university police and law enforcement agencies in regard to the situation at was "based on rumors and social media posts and not actual witness accounts," reports WHNT 19 News.

Although the school has not determined the credibility of threat, officials released a statement saying that are taking it seriously.

"While we have no credible information at this point to determine whether this is a legitimate threat, The University of Alabama is taking this situation very seriously," said UAPD Police Chief Tim Summerlin in a statement posted on the college website.

The University of Alabama Police also promised to continue to investigate and find the person(s) responsible for the posts.

"Posting a terrorist threat is a crime and will be treated as such. UAPD is aggressively investigating to identify the individual(s) involved. Among other things, we have requested search warrants and are consulting with the FBI," reads the statement.