NEWTOWN, CT (RNN/WTNH/CNN) - Dispatchers during the Sandy Hook Elementary School shooting stayed calm as they spoke with people inside the building.
"Somebody's got a gun," a female caller told 911. "I saw a glimpse of somebody running down the hallway. They're still running, they're still shooting. Sandy Hook school, please."
Town officials released the audio clips Wednesday. Teachers and school employees described hearing gunfire and seeing the front window shot to pieces while operators told them to take cover.
Rick Thorne, a custodian at Sandy Hook, described what he heard nearby as the attack took place.
Thorne: It's still happening.
Dispatcher: All right, what about the students in the front of the building?
Thorne: Everything's locked up as far as I know. I'm not in the front.
Dispatcher: OK, they're in lockdown?
Thorne: Yeah, they're in lockdown.
Dispatcher: Did you see anything out the window?
Thorne: No, it's still going on. I can't get over there.
Dispatcher: OK, I don't want you to go over there. I want to know what's happening with the students though, along the front corridor. This is in the front parking lot?
Thorne: Yes. I'm not in the front, I'm actually down the other part. But I'm close.
Dispatcher: OK, do you see anything or hear anything more?
Thorne: I keep hearing shooting. I keep hearing popping.
Connecticut State Attorney Stephen Sedensky had fought to keep the calls from being released.
Sedensky said Monday he will not appeal a judge's decision to make them public.
The massacre in Newtown, CT, was the second deadliest shooting in U.S. history.
On Dec. 14, 2012, 20-year-old Adam Lanza entered Sandy Hook Elementary School and opened fire on students and faculty. He killed 26 people inside the school during an 11-minute rampage, including 20 children in the first grade, before killing himself once authorities responded.
He also shot and killed his mother, 52-year-old Nancy Lanza, inside her home.
To donate to any of the charities helping Newtown victims, please visit www.newtowncharities.org