A Florida woman shot her 7-year-old grandson on Tuesday when she believed she heard an intruder in a Tampa-area home, WPTV reported.

Linda Maddox was babysitting her twin grandsons while their father worked a night shift, investigators said.

She placed a chair against the door of the bedroom in which they were sleeping for protection, according to WPTV.

Just before 1 a.m., Maddox heard the chair slide near the door. She thought it was an intruder and grabbed her loaded .22 caliber revolver from the bed.

She fired a shot toward the door in the dark. She then heard screams from her grandson, Tyler Maddox.

He was shot in the upper body and taken to a local hospital to be treated, according to WPTV. He is in critical, but stable condition.

H/t Gawker