At least 53 more people were injured, he said. Police have shot and killed the gunman, Mina told reporters.
“It’s appears he was organized and well-prepared,” the chief said, adding that the shooter had an assault-type weapon, a handgun and “some type of (other) device on him.”
Officials warned that a lengthy investigation was ahead, given the number of victims and the scope of the violence.
“There’s blood everywhere,” U.S. Rep. Alan Grayson told reporters. “There’s an enormous amount of evidence to be collected.”
Orlando Mayor Buddy Dyer said he had declared a state of emergency for the city and has requested the governor do the same for the state.
Law enforcement sources told the media that the suspect had possible explosive devices strapped to his body and in his vehicle, but a U.S. official said later that no explosives were found.
At least nine officers were involved in the shoot-out, Mina said. Several coroner vans were seen travelling toward the nightclub.
One officer suffered an eye injury when a bullet struck his Kevlar helmet, said Danny Banks, special agent in charge of the Florida Department of Law Enforcement’s Orlando bureau. The helmet saved the officer’s life, Banks said.
The shooter is not from the Orlando area, Mina said. He has been identified as Omar Saddiqui Mateen, 29, of Fort Pierce, about 120 miles south east of Orlando, two law enforcement officials tell the media.
Orlando authorities said they consider the violence an act of domestic terror. The FBI is involved. While investigators are exploring all angles, they “have suggestions the individual has leanings towards (Islamic terrorism), but right now we can’t say definitely,” said Ron Hopper, assistant special agent in charge of the FBI’s Orlando bureau.