Two custodians were found shot to death in a Southwest Side school building on Monday afternoon, according to information from Chicago police and the employees' union.
Police said a 63-year-old man and a 48-year-old woman were found unresponsive in the Garfield Ridge neighborhood's 5100-block of South Lotus Avenue around 3:40 p.m.
Video from the scene shows a large police presence at Mark Twain Elementary School. A stretcher could be seen, and tape blocked off part of the school's parking lot.
Police said each adult suffered a single gunshot wound to their head. Both were taken in critical condition to Christ Hospital, where they were pronounced dead.
What led up to the shooting was not immediately clear, but CPD is only classifying one of the deaths as a homicide. Investigators recovered a weapon from the scene.
"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 SEIU Local 73 Executive Vice President Trumaine Reeves.
Local 73 represents custodial staff at CPS.
Chicago Public Schools is not currently in session. Class starts in two weeks.
Area One detectives are investigating.
This is a developing story. Check back with ABC7 for updates.