(CNN) A 5-year-old Kentucky boy was struck and killed by his school bus after he got off at his stop.

Preliminary information from Kentucky State Patrol indicated the child was struck during the "unloading" Monday afternoon but didn't specify if the boy went in front of the bus or behind it.

The kindergartener from Morgantown was pronounced dead at the scene by the Butler County coroner.

The school district said the driver has worked for the district for 18 years and has an "exemplary driving record," CNN affiliate WBKO reported.

Kentucky State Patrol is investigating. The Butler County School District has not replied to CNN's request for comment.