A 4-year-old boy was sent to the hospital in critical condition after he was found with a gunshot wound to the head in a north Houston apartment, police said.

The Houston Police Department said officers were called to the 3200 block of Laura Koppe Road around 10:40 p.m. Tuesday.

Officials said the boy somehow got his hands on a gun and shot himself as a 2-year-old child slept nearby. The boy’s parents were said to be home at the time but were in another room.

Police said they interviewed the mom and dad, who said the child was supposed to be sleeping. The mother told police she believed the boy may have found the gun earlier in the day but hid it nearby before going to bed.

The boy’s father told police the pistol belonged to him, but it wasn’t immediately clear where the weapon was normally kept. He was placed in handcuffs and put in a patrol car, but police said he was only being taken in for questioning.

The young shooting victim’s grandfather identified the boy as Jose Luis.

Luis, who was first sent to Northwest Memorial Hermann, was still fighting for his life at Texas Children’s Hospital as of Wednesday morning.