WICHITA, Kan. -

Officials confirm no students were on board a First Student school bus when it wrecked with three other vehicles on eastbound Kellogg near I-235.

The wreck happened just before eight o'clock Tuesday morning. Wichita police said a small wreck in front of the bus caused the bus driver to slam on his brakes. That's when three more cars smashed into the back end of the bus and each other. One person suffered minor injuries.

The driver of the car that crashed directly into the back of the bus said as soon as she realized she wasn't injured in the wreck, she was immediately worried about who might have been on the bus.

"I saw her go look in the school bus so I knew that somebody was making sure," said Gina Koester, one of the drivers involved. "Because that's the first thing that you think of when you see the school bus is if there's kids in there and everything."

The bus was en route to its first stop of the day so again, no students were on board. First Student representatives said the bus will undergo a thorough inspection and have all necessary repairs made before it goes back to its regular routes.

Specifics about the cause of the wreck haven't been release because it is still under investigation. Crews remained on scene clearing the wreckage until about 9:15 Tuesday morning. Shortly after, all eastbound lanes were reopened to traffic.