A three-year-old boy accidentally shot and killed himself with his parents' gun, after being left unattended in a car while his mother went to buy petrol, the Associated Press has reported.
The mother left the toddler in the car with her boyfriend's four-year-old daughter, who was not injured in the accident, which happened in western Washington, USA.
The boyfriend had tucked the handgun under the front seat, before filling up with petrol. The mother was in the petrol station at the time.
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Police investigating the incident have described it as a "tragic accident", the Associated Press reports.