Daily Mail reporters who attended the meeting reported hearing three to four gunshots and Secret Service agents yelling to come downstairs.
Some in the crowd reported hearing what they believed to be five to eight shots being fired.
The banquet hall, where hundreds of prominent journalists, celebrities and national leaders were waiting for Trump to speak, was immediately evacuated.
The National Guard took up positions inside the building as people were allowed to exit the building but were not allowed to re-enter. Security outside was also extremely tight.
It wasn’t immediately clear what happened. A law enforcement official confirmed there was a shooter, but no further details were released yet.
