A child weeps while on the bus leaving The Covenant School following a mass shooting at the school in Nashville, Tenn. on Monday. Nicole Hester/The Tennessean via AP

NASHVILLE, Tenn. — Nashville authorities released 911 calls Thursday that capture the terror inside an elementary school during the attack this week that left three children and three adults dead, as callers pleaded for help in hushed voices as sirens, crying and gunfire could be heard in the background.

Police released recordings of three calls that were made during Monday’s attack at The Covenant School.

One caller told a dispatcher that she could hear gunshots as she hid in an art classroom closet.

“It sounds like somebody is shooting guns,” the caller said in the recording, which started just before 10:13 a.m. She then noted that there had been a pause in the gunshots.

The dispatcher asked if she was in a safe spot and said two other callers had reported gunshots at the school.

“I think so,” the caller said, as children could be heard in the background.

The teacher then said she could hear more gunshots and muffled thuds can be heard on the recording.

“I’m hearing more shots,” the caller said. “Please hurry.”

Another caller said he was in a room on the second floor and asked the dispatcher to send help.

“I think we have a shooter at our church,” he said, later adding: “I’m on the second floor in a room. I think the shooter is on the second floor.”

And in another call, a man told a dispatcher that he was with a group of people, including several children, and that they were walking away from the school toward a main road. Although the man remained calm, the tension and confusion of the situation are obvious, with several adults speaking over each other and children’s voices in the background.

Three adults and three 9-year-old children were killed in the attack. Authorities say police shot and killed the assailant, a former student they identified as 28-year-old Audrey Hale.

People pray during a community vigil held for the people killed during the Covenant School shooting, on Tuesday in Mt. Juliet, Tenn. A vigil is scheduled to be held in Nashville on Wednesday. Andrew Nelles/The Tennessean via Associated Press

The release of the recordings came as people protested at the Tennessee Capitol in favor of tighter gun controls, haranguing the Republican-led Legislature to take action following the school shooting.

Chants of “Save our children!” echoed noisily in the hallways between the state Senate and House chambers, with protesters setting up shop inside and outside the Capitol. Some silently filled the Senate chamber’s gallery, including children who held signs reading “I’m nine” – a reference to the age of the kids who died. Most protesters were removed from the gallery after some began yelling down at the lawmakers, “Children are dead!”

The protests followed a Wednesday night candlelight vigil in Nashville where Republican lawmakers stood alongside first lady Jill Biden, Democratic lawmakers, and musicians including Sheryl Crow, who has called for stricter gun controls since the attack.

The vigil was somber and at times tearful, as speaker after speaker read the victims’ names and offered condolences to their loved ones but refrained from any statement that could be seen as political.

“Just two days ago was our city’s worst day,” Mayor John Cooper said. “I so wish we weren’t here, but we need to be here.”

Police have said Hale drove up to the school on Monday morning, shot out the glass doors, entered, and began firing indiscriminately. Police later fatally shot Hale.

Among those killed were the three students, Evelyn Dieckhaus, Hallie Scruggs, and William Kinney; Katherine Koonce, 60, the head of the school; substitute teacher Cynthia Peak, 61; and Mike Hill, a 61-year-old custodian.

Absent from the Wednesday vigil was Tennessee Republican Gov. Bill Lee, who has been an advocate for less restrictive gun laws along with greater school security and once intimated that prayer could protect Tennessee from school shootings and other things.

Lee issued a video statement Tuesday saying that Peak was a close friend of his wife, Maria and that the two had been planning to meet for dinner on Monday.

“Maria woke up this morning without one of her best friends,” Lee said in a video statement, adding that his wife once taught with Peak and Koonce. The women, he said, “have been family friends for decades.”

Lee has avoided public appearances this week and has not proposed any possible steps his administration might take in response to the school shooting.

As with similar responses to gun violence, the state’s Republican leaders have avoided calling for tighter gun restrictions and instead have thrown their support behind adding more school security measures.

Addie Brue, 16, and Madeline Lederman, 17, shout “do something,” with other protesters as Rep. Jeremy Faison, R-Cosby, Chairman of the House Republican Caucus, walks towards the House chamber doors at the State Capitol Building in Nashville, Tenn. on Thursday. Nicole Hester/The Tennessean via Associated Press

In a letter to Lee, Republican Lt. Gov. Randy McNally called for securing windows and glass in school buildings, adding magnetic locks on doors, modernizing camera systems, and increasing armed guards.

“While these changes would come with a cost, I believe it is important for us to have a conversation about how to increase and modernize security at schools in Tennessee,” McNally wrote.

Along with improving school safety measures, McNally told reporters Thursday that he is in favor of red flag laws like one in Florida.

Meanwhile, Tennessee’s U.S. senators, Republicans Marsha Blackburn and Bill Hagerty were pushing for legislation that would create a $900 million grant program to “harden” schools and hire safety officers.

Blackburn and Hagerty said Thursday that they would introduce the SAFE School Act, which would help public and private schools train military veterans and former law enforcement officers to provide security. They said the grants could also be used to bolster physical security measures. Blackburn introduced similar legislation in the last Congress, but it failed to gain support.

Metropolitan Nashville Police Chief John Drake has not said what police think the shooter’s motive was, only noting that the assailant didn’t target specific victims and had “some resentment for having to go to that school.”

Drake said the shooter had drawn a detailed map of the school, including potential entry points, and conducted surveillance of the building before carrying out the attack. Drake also said Hale left behind writings that the chief referred to as a “manifesto,” but authorities haven’t released the writings to the public.

Police have said Hale was under a doctor’s care for an undisclosed “emotional disorder.” However, authorities haven’t disclosed a link between that care and the shooting. Police also said Hale was not on their radar before the attack.

Social media accounts and other sources indicate that the shooter identified as a man and might have recently begun using the first name Aiden. Police have said Hale “was assigned female at birth” but used masculine pronouns on a social media profile, however, police have continued to use female pronouns and the name Audrey to describe Hale.