Approximately 20 people people are dead inside Pulse nightclub, Orlando Police Chief John Mina said Sunday morning, just hours after a shooter opened fire in the club. At least 42 people have been transported for medical treatment, 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 he had an assault-type weapon and a handgun.

The shooting began around 2 a.m. Sunday, and an officer responded. The officer engaged in a shoot out outside the club. The gunman then ran into the club.
“That turned into a hostage situation,” Mina said.

More police rushed to the scene and broke down a door with an armored vehicle. At that point police shot and killed the gunman, Mina said.