A collision involving a pickup truck and school bus shut down County Road 45 north of Baltimore.
Emergency crews responded to the collision at approximately 3:20 p.m.
A southbound pickup truck collided with a northbound school bus, just north of Baltimore.
None of the four elementary school children or either driver were injured in the collision.
County Road 45 was closed in the area of the collision for approximately 30 minutes while the investigation took place and debris was cleared from the roadway.