A neighbor of Florida's Pulse gay club told a 911 dispatcher that panicked patrons were banging on his door for shelter and hiding behind his car during the June 12 massacre that saw 49 people murdered and 53 wounded.

The horrifying details emerged in transcripts and recordings of 911 calls made at the time, which were released by Orange County Sheriff's Office Tuesday.

The calls, which were mostly made by friends and relatives of those trapped with shooter Omar Mateen, show the fear and confusion that swirled that night - and the strength of the operators who kept callers calm and talking.

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Terror: Orange County Sheriff's Office released 911 calls that reveal the terror in Orlando on June 12, when Omar Mateen killed 49 and injured 53 after shooting up gay club Pulse

Fleeing: The caller at 4:20 speaks through an interpreter about victims from Pulse who are fleeing the shooting, trying to enter his building and hiding behind his car

Shooter: As Mateen (pictured) killed innocents in Pulse gay club, their family and friends tried desperately to get help from emergency services

Speaking through an interpreter, the Spanish-speaking caller, who lives near Pulse, says that people are banging on his door, and gunshots are being fired.

The man - who, according to the translator refers to Pulse as a 'piece of crap disco' - says that his door is locked, and that he believes people are also hiding behind his car.

The operator advises him to stay inside with his door locked.

In another call, a man - who is driving to Orlando from out of town - can be heard weeping as he says his son has been shot and is bleeding out in the club.

'He got shot in one of the bathrooms,' he says, audibly emotional, 'and nobody's going in for him.'

The operator tries to reassure him that the SWAT team are about to go in, and tells him to ask his son to do whatever the police tell them to do.

'Anybody dead yet?' he asks. 'I don't know, sir,' she replies. 'Okay, okay, all right, thank you,' he says, voice flat with dread.

'I can't do nothing': This caller, who left Pulse before the shooting, panics over not being able to do anything about his friend, who has been shot three times

WARNING: STRONG LANGUAGE In this recording a caller swears repeatedly, as he is scared that his girlfriend will die, and police still have not entered the building

Another recording is of a man whose girlfriend is texting him from the club's bathroom.

'There's like 18 people, two are dead, they're in the bathroom,' he says. 'They're all scared to death, they all think they're gonna die.'

He tells the operator that the girlfriend is texting him because she's scared the shooter - not yet identified as Mateen - will hear.

The man also says his girlfriend told him the shooters were 'there' - 'So I don't know if they're in the bathroom with her now or just in the club,' he frets.

Later, he says, the texts have stopped coming.

'It's OK, she might be with the deputies or she might be just trying not to let the light come out,' the dispatcher replies. 'I'm gonna stay on the phone with you.'

Trapped: Many calls concerned the bathrooms, where people were trapped by Mateen. One is from a man whose girlfriend is texting him from the bathroom - but suddenly stops

Hiding: This operator asks for a description of the shooter but the caller says her brother's phone is 'going on and off' because he keeps hiding the phone

Survivors who hid in a bathroom later recalled Mateen opening fire on people in the stall next to them, killing everyone. It's not clear if the man's girlfriend survived.

Another caller told an operator that his friend had also been shot in a bathroom, but was still alive and hiding.

'We called him because he posted on Facebook that he had got shot, so we said, "Is everything OK?"

'He said, "Got shot three times." We said, "Where are you?" And the response was "In bathroom, tell them to check the bathroom."'

Dead people: In this call, a man's ex-girlfriend is hiding in the club, surrounded by bodies; the operator assures him police are on the scene

Brother: This woman's brother was hidden in the bathroom, texting her with updates so she could inform authorities

Desperate: Operators tried to reassure callers that police were dealing with the situation - but as the situation wore on, hour by hour, the messages became more and more desperate

And one call came through from a man who narrowly escaped death.

'I just got home from the Pulse club,' he told the 911 operator. 'My friends texted me (to) tell me there is a shooting going (on). A lot of my friends got shot.'

She advised him not to call or text his friends.

'A friend told me he got shot three times,' he added, his voice beginning to crack. 'He's in the bathroom, pleading "Help, help" - I'm not there, I can't do nothing!'

The Orlando Police Department, meanwhile, has yet to release its 911 calls, and the city is in a court dispute with two dozen news media companies over their release.

Silent: This woman said her brother was hiding and couldn't talk, in case he attracted the shooter

Assistance: In this call, EOD - Explosive Ordinance Disposal - units are offered up from Seminole County

Mateen, 29 opened fire at the gay club in what is the worst mass-shooting in recent US history. He was killed after a standoff with police that lasted more than the hours.

He claimed to have dedicated his murders to ISIS, but is believed to have worked alone, without orders from abroad.

In addition to the 49 fatalities, the shooting left 53 patrons hospitalized.