ORLANDO, Fla. (AP) — The mayor of Orlando says there were 50 casualties and there are 53 more hospitalized after a mass shooting at a popular gay nightclub there.

“There’s blood everywhere,” Mayor Buddy Dyer said Sunday at a news conference, hours after the shooting.

He says the shooter used an assault rifle on all those killed.

Earlier, U.S. Rep. Alan Grayson identified the shooter as Omar Mateen of Port St. Lucie, Florida. He cited law enforcement officials in speaking to reporters.