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Friends and family members embrace outside Orlando Police Headquarters after a shooting at the Pulse night club, in Orlando, Florida, June 12, 2016.

Orlando Police officers direct family members away from a multiple shooting at a nightclub in Orlando, Florida, June 12, 2016.

Police cars and fire trucks are seen outside the Pulse night club after a mass shooting, Orlando, Florida, June 12, 2016.

Emergency personnel at Orlando Regional Medical Center hospital prepare to treat people wounded at the Pulse Orlando nightclub in Orlando, Florida, June 12, 2016.

Officers arrive at Orlando Police Headquarters during the investigation of a shooting at the Pulse nightclub, Orlando, Florida, June 12, 2016.

Volunteers Clinton Grubb Brittani Acuff and others gather at The Center, a LGBT organization, to provide assistance and counseling to the community after an early morning shooting at a gay nightclub in Orlando, Florida, June 12, 2016.

Demetrice Naulings sobs outside  Orlando Police Headquarters where police are interviewing witnesses in the investigation of a shooting at the Pulse nightclub, Orlando, Florida, June 12, 2016.

An Orange County Sheriff's Department SWAT member arrives at the scene of a fatal shooting at Pulse Orlando nightclub in Orlando, Florida, June 12, 2016.

Hundreds of community members line up outside a clinic to donate blood after an early morning shooting attack at a gay nightclub in Orlando, Florida, June 12, 2016.