A Pulse patron is heard whispering to a dispatcher "he's going to kill us" in one of more than 20 emergency calls released Wednesday afternoon.

The Orange County Sheriff's Office released the remainder of the 911 calls it received during the June 12 nightclub massacre in which 49 people were killed by gunman Omar Mateen.

In the call, the man tells the dispatcher he's unhurt and hiding in a room at Pulse. The dispatcher is at first confused and appears not to realize at first that the man is involved in the shooting.

The Sheriff's Office was among several law enforcement agencies that helped Orlando Police during the attack. That department, which is involved in a public-records lawsuit with several media companies, has released only a fraction of more than 600 emergency calls it received. Charter is not among the media companies in the suit.

Information from the Associated Press was used in this report.