Frantic calls released from school shooting: 'I need you to play dead'
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WATCH: Authorities released the 911 calls from the Feb. 14 deadly school shooting.

"I love you, it’s going to be fine," a panic-stricken mother said over the phone to her child hiding in a classroom during the Parkland, Florida, school massacre. "Can you play dead? I need you to play dead."

Officials on Thursday released some of the frantic 911 calls made during the Feb. 14 mass shooting. Seventeen students and staff members were shot and killed in the massacre at Marjory Stoneman Douglas High School that sent shock waves across the nation.

The suspected school shooter, Nikolas Cruz, a former student, was arrested after the shooting. On Wednesday a grand jury indicted Cruz, charging him with 17 counts of premeditated murder in the first-degree and 17 counts of attempted murder in the first-degree.

Students and parents embrace after a mass shooting at the Marjory Stoneman Douglas High School in Parkland, Fla., Feb. 14, 2018.

School officer Scot Peterson, who was criticized in the wake of the shooting for not going into the school, can be heard telling a dispatcher, "We don't have any description but it appears to be -- shot -- shots fired" as gunfire is heard in the background. A minute later he shouts, "Get the school on lockdown, gentlemen!"

Peterson is heard warning officers not to enter "12 or 1300 building" and six minutes after making the initial call gives a description of the suspect, saying, "10-4 all units be advised a male in a hoodie possible AR-15 or AK-47."

One man who was not at the school but was on the phone with a student inside told the 911 operator that two students were alone huddled in one classroom.

That man acted as the liaison between the hiding student and the dispatcher.

Students released from a lockdown are overcome with emotion following following a shooting at Marjory Stoneman Douglas High School in Parkland, Fla., Feb. 14, 2018.
People bow their heads while waiting for word from students at Stoneman Douglas High School in Parkland, Fla., after a shooting on Feb. 14, 2018.

"Don’t talk, just be quiet," the man tells the student.

"Try hiding behind the curtain or something," he says, later asking if there's a cabinet or a closet in the room.

Students are evacuated by police from Marjory Stoneman Douglas High School in Parkland, Fla., after a mass shooting on Feb. 14, 2018.

The operators asks if there are teachers there and the man says just two students.

"She’s hearing yelling in the hallway," the man said.

"Tell her to be quiet," the operator said. "We don’t know -- there’s a lot going on, just tell her to be quiet."

Marjory Stoneman Douglas High School staff, teachers and students return to school greeted by police and well wishers in Parkland, Fla., Feb. 28, 2018. Photo Credit: Rhona Wise/AFP/Getty Images
Samuel Zeif, an 18-year-old senior at Marjory Stoneman Douglas High School in Parkland, Fla., cries after speaking during a listening session with President Donald Trump and students and teachers in the State D... Photo Credit: Carolyn Kaster/AP
Mark Barden, right, founder and managing director of Sandy Hook Promise, speaks during a listening session hosted by President Donald Trump with survivors of school shootings, their parents and teachers in the ... Photo Credit: Chip Somodevilla/Getty Images
Hundreds of protesters gather at the Florida state Capitol in Tallahassee on Feb. 21, 2018 to push for legislation regulating assault-style weapons and guns in general, after seventeen people were killed by a g... Photo Credit: Colin Abbey/EPA via Shutterstock
Students from Marjory Stoneman Douglas High School and those supporting them react as they watch the Florida House of Representatives vote down a procedural move to take a bill banning assault weapons out of co... Photo Credit: Colin Hackley/Reuters
Students who survived the shooting at Stoneman Douglas High School wait to board buses in Parkland, Fla., Feb. 20, 2018. The students plan to hold a rally Wednesday in hopes that it will put pressure on the sta... Photo Credit: Gerald Herbert/AP
The flag draped coffin of Alaina Petty is taken out after her funeral at The Church of Jesus Christ of Latter-day Saints, Feb. 19, 2018, in Coral Springs, Fla. Photo Credit: Joe Raedle/Getty Images
Cindy Sotelo (R) cries with her daughter, Jessica Malone, an alumna of Marjory Stoneman Douglas High School, as they visit a makeshift memorial setup in front of the school, Feb. 19, 2018 in Parkland, Fla. Photo Credit: Joe Raedle/Getty Images
Demonstrators hold flags during a "lie-in" demonstration supporting gun control reform near the White House on Feb. 19, 2018, in Washington. Photo Credit: Zach Gibson/Getty Images
Melissa Goldsmith visits a makeshift memorial setup in front of Marjory Stoneman Douglas High School, Feb. 18, 2018 in Parkland, Florida. Photo Credit: Joe Raedle/Getty Images
Candles that were placed on crosses still glow after last nights vigil for victims of the mass shooting at Marjory Stoneman Douglas High School, at Pine Trail Park, Feb. 16, 2018, in Parkland, Fla. Photo Credit: Mark Wilson/Getty Images
People attend a candle light memorial service for the victims of the shooting at Marjory Stoneman Douglas High School that killed 17 people, Feb. 15, 2018 in Parkland, Fla. Photo Credit: Joe Raedle/Getty Images
A young girl clutches a friend during candlelight vigil for victims of the mass shooting at Marjory Stoneman Douglas High School at Pine Trail Park, Feb. 15, 2018 in Parkland, Fla. Photo Credit: Mark Wilson/Getty Images
Family members gather at a staging area for parents to meet their children at the Fort Lauderdale Marriott Coral Springs Hotel following the mass shooting at Marjory Stoneman Douglas High School in Parkland, Fl... Photo Credit: RMV/REX/Shutterstock
Broward County Superintendent of Schools, Robert W. Runcie, speaks to the media about the mass shooting at Marjory Stoneman Douglas High School where 17 people were killed, Feb. 15, 2018, in Parkland, Fla. Stan... Photo Credit: Mark Wilson/Getty Images
Women embrace in a waiting area for parents of students after a shooting at Marjory Stoneman Douglas High School in Parkland, Fla., Feb. 14, 2018. Photo Credit: Joel Auerbach/AP
Family members embrace following a shooting at Marjory Stoneman Douglas High School, Feb. 14, 2018, in Parkland, Fla. Photo Credit: Wilfredo Lee/AP
A student stands near friends after being reunited with her mother after a school shooting in Parkland, Fla., Feb. 14, 2018. Photo Credit: Xavier Mascareas/Treasure Coast Newspapers via USA Today
The police block off the Pelican Bay West subdivision of Wyndham Lakes, Feb. 14, 2018, where gunman Nikolas Cruz lived, following a mass shooting at Marjory Stoneman Douglas High in Parkland, Fla. Photo Credit: RMV/REX/Shutterstock
Students Kelsey Friend and David Hogg recount their stories about yesterday's mass shooting at the Marjory Stoneman Douglas High School, Feb. 15, 2018. Photo Credit: Mark Wilson/Getty Images
Students released from a lockdown embrace following a shooting at Marjory Stoneman Douglas High School in Parkland, Fla., Feb. 14, 2018. Photo Credit: John McCall/South Florida Sun-Sentinel/AP
Nikolas Cruz is taken into custody by police after a shooting at Stoneman Douglas High School in Parkland, Fla., Feb. 14, 2018. Photo Credit: WPLG
Nikolas Cruz is placed into handcuffs by police near Marjory Stoneman Douglas High School following a mass shooting in Parkland, Fla., Feb. 14, 2018. Photo Credit: Police photo
A father and daughter embrace after a mass shooting at the Marjory Stoneman Douglas High School in Parkland, Fla., Feb. 14, 2018. Photo Credit: Saul Martinez/The New York Times
Medical personnel tend to a victim following a shooting at Marjory Stoneman Douglas High School in Parkland, Fla., on Feb. 14, 2018. Photo Credit: John McCall/South Florida Sun-Sentinel via AP
Students are evacuated by police from Marjory Stoneman Douglas High School in Parkland, Fla., after a mass shooting on Feb. 14, 2018. Photo Credit: Mike Stocker/South Florida Sun-Sentinel via AP
Students put their hands up in the air as armed police enter their classroom, following a shooting at the Marjory Stoneman Douglas High School in Parkland, Fla, in an image taken from a Feb. 14, 2018 social med... Photo Credit: Alexander Ball, Melody Ball via Reuters
A law enforcement officer directs traffic outside of Stoneman Douglas High School in Parkland, Fla. after reports of an active shooter, Feb. 14, 2018. Photo Credit: John McCall/South Florida Sun Sentinel/Polaris
People are brought out of the Marjory Stoneman Douglas High School after a shooting, Feb. 14, 2018, in Parkland, Florida. Photo Credit: Joe Raedle/Getty Images
The Marjory Stoneman Douglas High School. Photo Credit: Joe Raedle/Getty Images

"Let her know she’s doing good, just keep try to keep her calm," the operator adds. "She’s doing good. All police, we got extra units from other places in other cities coming."

The man relays to the student, "Be calm, be quiet, help is on the way. Police from all over are coming."

First responders gather after a shooting at Stoneman Douglas High School in Parkland, Fla., Feb. 14, 2018.

"There’s no place to hide," the man tells the dispatcher. "They are crouched."

Next to the man was the student's mother, listening on speaker phone.

Later the man says, "Somebody just entered the room."

"OK, who is it that entered the room?!" the operator asks.

Alana Koer, of Parkland, Fla., shows the text messages she exchanged with her son during the shooting at Marjory Stoneman Douglas High School, during a vigil on Feb. 15, 2018.

The man asks into the phone, "Is it the police?!"

Then the mother listening over the phone says, "I love you! I love you! It’s mom."

The man tells the dispatcher, "It’s the police, they said put your hands up."

"I love you, I love you, it’s going to be fine," the mother says. "Can you hide from there? Can you play dead? Can you play dead? I need you to play dead."

Finally the man says the student told him the police arrived.

An officer talks to parents of students from Stoneman Douglas High School in Parkland, Fla., after a shooting on Feb. 14, 2018.

"The police are there right now and they are checking the injured out," he tells the dispatcher. "The police are escorting the students out of the classroom."

"OK alright, sir," the operator says. "Thank you so very much, sir."

"Thank you for all your help," he replies. "I hope this turns out to be not as bad."

"Yes, I hope so too," the operator adds.

ABC News' Malka Abramoff, Katherine Carroll, Alexandra Faul, Rachel Katz and Brendan Rand contributed to this report.