Chicago elementary school shooting leaves 2 custodians dead, police say

CHICAGO - Two custodians are dead after a shooting Monday afternoon at a Chicago elementary school, authorities said.

Shooting at Chicago elementary school leaves 2 dead

What we know:

The shooting happened around 3:40 p.m. at Mark Twain Elementary School in the 5100 block of South Lotus Avenue.

Chicago police said officers found two adults unresponsive inside the school.

A 48-year-old woman who had been shot once in the head was taken to Christ Hospital in critical condition. A 63-year-old man who had also been shot once in the head was taken to the same hospital in critical condition, police said.

Officers recovered a weapon at the scene.

What they're saying:

SEIU Local 73 issued this statement on the incident:

"The only facts we know right now are that two families have lost a loved one and our prayers are with their families, and the staff, students, and families at Mark Twain Elementary School," said Trumaine Reeves, executive vice president of SEIU Local 73. 

One neighbor in the area said she lives across the street and is familiar with the custodial staff. 

"I feel sorry, I feel bad about them and we know some of them. And we know the supervisor," said Ana Medina. 

Felicia Purga's daughter is a student at Mark Twain, and she said she's nervous for the start of the school year. 

"It's this type of gun violence that just panned out. Yes. Now, how am I going to feel safe with her eating in a cafeteria where this all happened? That's pretty gruesome, you know, and it's crime scene. I can't eat and think. I can't even eat and watch a scary movie. You know, like, I can only image what the scene is inside of there," Purga said.

What we don't know:

Authorities have not said what led to the shooting and their identities have not been released.

What's next:

The school was not in session when the shooting happened. Students are scheduled to return Aug. 24.

This is a developing story. Check back for updates.