ORLAND, Calif. — The National Transportation Safety Board found that every student involved in the April motorcoach accident that killed five Southern California students, three chaperones, and the drivers of both the coach and the FedEx truck that barreled into them, said they were not given the required safety instructions from the driver before the crash, Fox News reported.

Investigators questioned every student and were told that neither of the bus drivers on the trip told them about emergency exit windows or showed them a safety video, per the bus company’s policy.

Investigators still have yet to determine why the FedEx truck barreled across the median of Interstate 5 100 miles north of Sacramento and struck the bus carrying Southern California students on a visit to Humboldt State University in April 2014. For the full story, click here.