LAKE BUENA VISTA, Fla. (AP) — Investigators have found that a 9-year-old boy killed in a collision with a Walt Disney World bus while riding his bicycle was "solely responsible" for the accident.

The Florida Highway Patrol report released Monday shows Chase Brubaker's bicycle also had a flat rear tire and an underinflated front tire that could have contributed to the April 1 crash. FHP says bus driver David Rich was not at fault, and no charges will be filed.

The report shows the bus was traveling in the same direction as Brubaker when he crossed into the road and hit the bus. He was pulled under the right rear tire.

FHP says its investigation is complete.