A 4-year-old boy accidently shot and killed his 2-year-old brother in the Riverside neighborhood of Minneapolis, CBS reported Tuesday.
Authorities reported 2-year-old Neegco Xiong was pronounced dead in the ambulance at the scene, CBS said.
The father Kao Xiong, 33, said he had wedged the semi-automatic handgun under a pillow next to the bed's headboard, according to the Star Tribune Wednesday.
Xiong said he was home for lunch and his wife was vacuuming when they heard the single gunshot from the upstairs room where the two brothers were playing, the Star Tribune said.
Xiong attempted CPR on the 2-year-old while his wife called 9-1-1, according to the Tribune.
An investigation is being conducted and the findings will be turned over to the Hennepin County attorney's office, Sgt. William Palmer, a Minneapolis police spokesman told the Star Tribune.
According to CBS, a 4-year-old cannot be charged with a crime in Minnesota, but it is a crime to store a loaded firearm in a manner where a child can get to it.