(Newser) – What started out as fun playtime between a 4-year-old Ohio boy and his 3-year-old sister ended horrifically after the boy accidentally shot his sister with a gun, the Cleveland Plain Dealer reports. The children were playing in a room by themselves in a Lorain home yesterday morning when the boy found the .40-caliber handgun in a dresser and accidentally pulled the trigger, shooting his sister in the head, according to cops.

When police arrived at the house, they found the father of the kids cradling his daughter; the 4-year-old was crying and told police multiple times that he was sorry, the AP reports. Three other people in the home at the time of the shooting were interviewed by police and the gun was recovered. The injured girl is reported to be in critical condition at Rainbow Babies & Children's Hospital. (A 5-year-old Kentucky boy accidentally killed his 2-year-old sister with his "My First Rifle" last year.)

