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Harrowing new vision has emerged of children scrambling from windows in the moments after a gunman stormed a Texas primary school last week.
The images show students sprinting across the grounds and police smashing windows after gunman Salvador Ramos, 18, entered the Robb Elementary School in Uvalde, last Tuesday.
The deadly shooting rampage left 19 children and two teachers dead. Ramos was also killed by law enforcement officers.
In the video, dozens of officers and first responders are seen surrounding the perimeter of the building while some perch nearby a window.
One of the windows then appears to be smashed to enable the primary-age children inside the same building where the active shooter was inside. to then escape to safety.
Police can be seen lifting the students out of the window, and then telling them to run away from the school.
The police response to the tragedy has been under scrutiny since it emerged police officers were stationed in the hallway outside of classroom 12 for almost an hour before they entered to confront the killer.
Officers arrived at the school within minutes, but the commander on scene decided to wait over an hour for reinforcements, even as children locked inside the room with the gunman called 911 and begged for police help.
Video taken from the outside of the school during the incident, obtained by the US media outlet ABC News, includes what appears to be dispatch audio informing officers on scene a child is calling 911 from a classroom.
"Advise we do have a child on the line," the dispatcher says.
"Child is advising he is in the room full of victims."
The source of the video is unclear and it is unclear at what point in the incident the audio is heard.
The video indicates police at the scene were informed at least one child remained alive inside the classrooms.
The Texas Department of Public Safety director Steve McCraw said there were at least eight 911 calls from at least two separate callers from inside the school, covering a span of nearly 50 minutes.
The decision made on scene to treat the incident like a barricaded suspect, rather than an active shooter, was "wrong," he said.
- Reported with CNN