Chilling Moment Orlando Gunman Opens Fire In Gay Club Is Caught On Victim's Snapchat Video

#1 Horrifying footage has emerged from the tragic shooting at Pulse nightclub in Orlando on Sunday morning.

Amanda Alvear posted a video of her night out at Pulse to Snapchat.

It is the first footage from inside the nightclub massacre, with Amanda having since been confirmed as one of the fatalities.

Ashley Velez, sister of the 25-year-old Puerto Rican, pid tribute to Amanda, saying:

"I love you baby girl. You were and will always be my baby sister. I'm so heartbroken. You could make anyone's day with the smile of yours."

#2 Inside Pulse nightclub during mass shooting

#3 Clips initially show her having fun with friends.

#4 But later on the sound of gunfire rings out loudly.

#5 Mercedez Marisol Flores, who was at Pulse with her best friend Amanda, has also been named among the victims.

The 26-year-old worked at the retailer Target and lived in the Florida city of Davenport.

#6 Eddie Justice texted his mother before he was killed.

He wrote: "He's coming. I'm gonna die," before then saying: "He has us, and he's in here with us."

It was the last she heard from him and he was later confirmed as one of the victims.

#7 Investigators examine the scene of Pulse.

#8 Omar Mateen, 29, was identified as the shooter by his ex-wife.

He was later gunned down by a SWAT team who are believed to have used explosives to distract Mateen after he took hostages. ISIS has since claimed responsibility for the shooting.

#9 People hold candles to pay tribute to Orlando nightclub shooting victims in Vancouver, Canada.

#10 A sign as part of a makeshift memorial is pictured following a mass shooting at the Pulse gay nightclub.

#11 A van from a funeral service is seen infront of the Pulse club in Orlando.

Democratic candidate Hillary Clinton and her Republican rival Donald Trump are both expected to address the issue later today at campaign events.

#12 The One World Trade Center tower is lit up in the colors of the pride flag to honor the victims of a mass shooting at a nightclub in Orlando.

#13 Rainbow flags in Manchester Gay Village at half mast following the mass shooting at a gay nightclub in Orlando.

#14 Clips initially show her having fun with friends, but later on the sound of gunfire rings out loudly.