Jackson Police Department is investigating how a 4-year-old killed by an accidental self-inflicted gunshot wound Saturday was able to access the weapon.

The child was unattended inside a parked vehicle in the parking lot of Raceway Gas Station on South Highland Avenue when the firearm discharged, Jackson Police Chief Julian Wiser confirmed Wednesday.

Police responded to the gas station around 1:03 p.m. Investigators determined that the child suffered a fatal self-inflicted gunshot wound.

The investigation is ongoing. It is not yet clear if anyone will be charged in relation to the shooting.

The identities of the child and others involved have not been released.

Reach Cassandra Stephenson at ckstephens@jacksonsun.com or at (731) 694-7261. Follow Cassandra on Twitter at @CStephenson731.