Uvalde School Shooting 911 Audio, Student Mentions Multiple Child Victims

Reports of children calling 911 from within the classroom where the gunman massacred upwards of 20 people are accurate and harrowing ... 'cause you can now hear it in audio.

Listen to one of these dispatchers radioing in last Tuesday to any units available in the area and trying to find out if any officers had responded yet -- and notifying all of them that a child had dialed in for help ... from inside the classroom with the shooter.

The dispatcher asks if anyone is in or around that building, noting the child has told them the room is full of victims. A bit later, you hear a rough number from them -- 8 to 9 kids.

As we know, that number ended up being significantly higher -- 21 people total were killed, including 19 children -- and worse yet ... it took the authorities a lifetime and a half to engage the gunman and get other people out.

19 different cops were on the scene, but were apparently told to stand down and wait -- this as the killer was in the classroom and slaughtering kids.

It's unclear exactly why the commanding officer gave these orders -- it seems it might've been bad intel -- but in any case, it took over an hour for anyone to actually go in and do something. The officers who ended up taking the shooter out were Border Patrol agents.

What's become evident since is that if law enforcement had engaged earlier, they could've saved lives ... but their delayed response was far too late. 77 minutes is the official time.