The Latest on the release of 911 audio and rooftop video from the mass shooting in Las Vegas last year. (all times local):

5:15 p.m.

Emergency calls released by Las Vegas police from the deadliest mass shooting in modern U.S. history show civilians trying to get reinforcements for first responders.

One 911 caller tells a dispatcher that a small group of policemen, military and EMTs is overwhelmed trying to care for five gunshot victims after a sixth person died.

"Is someone coming?" the caller asks. "Is there an ambulance coming?"

The dispatcher says an ambulance cannot enter until authorities secure the area.

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4:30 p.m.

In one 911 call released by police investigating the Las Vegas mass shooting, family members can be heard sobbing over a loved one who was shot.

"You guys, talk to him, talk to him," a woman says. "Tommy, you'll be good. Come through this. He's breathing!

"Keep talking to him," she says as others wail in the background.

"Dad, I'm with you."

Another woman told a dispatcher that she had been separated from a friend who is a triage nurse and went off to help people who were injured.

"It's chaos around me," the woman said.

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3:25 p.m.

As police and paramedics rushed to help hundreds of people shot during a country-music festival in Las Vegas, some concert-goers had to tend to people's wounds as best they could while awaiting aid.

One 911 call released Wednesday is from a woman who calmly tells a dispatcher that she has two people with gunshot wounds, including one who is in "very bad shape."

She says the wounded woman is pale and having difficulty breathing as she bleeds from a gunshot wound above her leg.

She says they've tied a belt for a tourniquet and put gauze on the wound but "she seems to be fading pretty fast."

Authorities say 58 people died and hundreds were injured when Stephen Paddock fired assault-style rifles from a hotel suite into the concert crowd.

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3:20 p.m.

In one call about two minutes after police say gunfire was first reported during the mass shooting in Las Vegas, a man says he saw his friend shot in the stomach and pleads for the dispatcher to "send everyone!"

"Are you hurt?" the dispatcher asks.

"No, but there's a hundred people on the ground bleeding out, right now. Send everybody! There's ... people running for their lives right now. Please, there's another person shot in the leg. Please hurry up!"

About the same time, a man who identifies himself as a military special forces member who is unarmed says he heard automatic weapon fire.

"I have no idea where he is," the caller says. "I don't have visual on target."

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3:20 p.m.

A woman identifying herself as Jennifer sounds terrified as she reports being underneath a stage during the mass shooting in Las Vegas.

"There's a lot of people here who need ambulances, people shot at everywhere," she says before starting to sob. "We're terrified. We still hear the shooting."

She tells the operator about one man who was shot in the stomach but decided to leave the cover of the stage to get help.

Another petrified caller was barely audible as an operator tried to comfort her.

"I just want you to stay hidden, OK? We're out on scene," the operator says. "We're going to come find you."

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3:10 p.m.

Hundreds of 911 calls released by Las Vegas police from the Oct. 1 mass shooting show the efforts that helpless concert-goers took to hide at an outdoor music festival where the attack occurred.

Callers said they were hiding in trash and storage containers and even a port-o-potty.

In one call, a panicked woman said she was with her wounded husband.

"He's down. He's been shot," she said.

The woman said she is a nurse. The 911 operator gently asks her if she can help her husband until paramedics arrive.

"You're a nurse. I need you to do what you do, OK? I need you to help. Are you going to be OK?" the operator says.

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3:05 p.m.

Recordings of 911 calls during the Las Vegas mass shooting show one woman said a barrage of gunfire sounded like a machine gun.

She says on the call released Wednesday that she hid with a group of people near the concert's portable bathrooms and was terrified that a shooter might be coming around the corner.

She told the dispatcher she saw "tons" of people down outside and she was terrified for the daughter who was with her.

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3 p.m.

A man who called 911 during the Las Vegas mass shooting said his 19-year-old daughter had been shot twice at the Route 91 festival.

He said she was hiding in a Budweiser booth and needed medical attention right away.

In the background, he tells his daughter that he's stuck in traffic.

"I'm trying to get to you, sweetie," he said.

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2:50 p.m.

Emergency calls released by police in Las Vegas from the deadliest mass shootings in modern U.S. history show confusion by callers about what is happening.

In one call, a man at the Route 91 Harvest Festival concert reported active gunfire.

The man, who spoke in a calm voice, said he didn't know where the shooting was coming from and whether there might be a "gunfight outside or not."

The dispatcher asked if he was in a safe location. He said he did not know how safe he was and said people were starting to leave. He sought reassurance on whether it was safe.

The dispatcher told the man help was on the way and to stay wherever he felt safe.

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2:45 p.m.

One 911 call made during the Las Vegas mass shooting came from a woman hiding with a group of people near portable bathrooms at the Route 91 Harvest Festival.

The woman was breathing hard as she said the barrage of gunfire sounded like someone had a machine gun.

"We keep hearing the shots getting closer and there's people down out there," she said, her voice panicked. "Oh my God! I'm with my daughter, I'm so scared for her."

2:40 p.m.

A Mandalay Bay security guard called 911 and reported an active shooter in room 32-135 during the mass shooting last year in Las Vegas.

The security officer said there were managers below and above the floor, and they could hear semi-automatic rapid fire.

He said they have one officer who was shot and paramedics were on the way.

He said they couldn't reach the shooter because he had barricaded himself inside.

Soon after, the officer said they have "a new active shooter, casino level." It turned out to be a false alarm

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2:30 p.m.

Some 911 operators picked up the phone during the mass shooting in Las Vegas to the sounds of rapid gunfire, screaming and sobbing as callers pleaded for help.

Some callers were no longer on the line during some 911 calls received as the horror unfolded.

"My husband's been shot," one crying woman who identified herself as Amanda told an operator. "We're just getting off the Strip ... There was a terrorist attack."

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2 p.m.

Police in Las Vegas have released 911 calls by concert-goers and video footage showing the deadliest mass shooting in modern U.S. history.

Frantic calls from concert-goers tell police that people are being targeted by shots and hiding under the stage at a concert venue near the Mandalay Bay hotel.

Video taken from the roof of the hotel shows people in the venue falling and others trying to help them as people run toward exits.

The material was provided Wednesday under a court order more than eight months after the Oct. 1 shooting that killed 58 people and injured hundreds of others.

It's the fifth batch of records made public without comment by Clark County Sheriff Joe Lombardo or his department. The FBI in Las Vegas also declined to comment.

Lombardo has said investigators don't know a motive for the attack and he doesn't think one will be determined.

He said no link has been found to international terrorism.

Authorities say gunman Stephen Paddock acted alone in shooting from the 32nd floor of the Mandalay Bay hotel into an outdoor concert crowd.

The investigation is continuing.