Pulse Remembrance Day

The timeline of the events at Pulse Nightclub, in Orlando Florida, on June 12, 2016, provided by NPR.org

At 2:02 a.m., a warning appeared on the club's Facebook page: "Everyone get out of pulse and keep running."

Many did. But not everyone could.

At 2:18 a.m., A SWAT team was called

At 2:35 a.m., about half an hour after the shooting began, the shooter made one of several 911 calls, according to the FBI.

At 2:48 a.m., the gunman spoke with crisis negotiators from the Orlando police.

He had a second conversation with them at 3:03 a.m. and a third at 3:24 a.m.

At 3:58 a.m., the Orlando Police Department's Twitter account warned residents to stay away from the area.

At 4:21 a.m., police cleared a way for some people trapped inside the club to escape by dislodging an air conditioning unit from a Pulse dressing room window. As clubgoers were being rescued, they told police the shooter had threatened to put bomb vests on four people within 15 minutes.

As 5 a.m. approached, those inside had been trapped for nearly three hours, some wounded and bleeding, calling police from their cellphones and pleading for help.

At 5:02 a.m., a SWAT team and the Orange County Sheriff's Office Hazardous Device Team "began to breach [the bathroom] wall with explosive charge and armored vehicle to make entry," according to the FBI.

At 5:15 a.m., police reported the shooter was down.

A police tweet confirmed the gunman's death at 5:53 a.m., just before sunrise Sunday morning.