The first call came from a little girl who called multiple times on Tuesday. She identified herself and told authorities what room the shooter was in, said Steven McCraw, the director of the Texas Department of Public Safety.
Here is a 911 emergency call timeline outlined by McCraw at a news conference:
12.03 pm The first call comes from a little girl who says she is in room 112. She identified herself and whispered, He s in room 112 McCraw says, without identifying the pupil.
The same girl calls back and warns that there are multiple people dead.
She calls back at 12.16 pm and says there are eight to nine students alive.
A 911 call from room 111 is made from the phone of another child. McCraw says she hangs up when another student tells her to hang up.
Three shots were fired, according to the 911 call. It was not clear what 911 call they were listening to at that time. A 911 call is made at 12.36 pm that lasts for 21 seconds.
The initial caller called back and is told to stay on the line and be very quiet. She tells 911 that he shot the door 12.43 pm and 12.47 pm. She asked 911 to send the police now, McCraw says.
She says she can hear the police next door.
The 911 call can be heard at 12.50 pm, according to McCraw.
12.51 pm The 911 call is very loud and it sounds like officers are moving children out of the room. The first child that called was outside before the caller cut off, McCraw said.