ORLAND, Calif. (AP) - Federal investigators say they will review whether a stretch of California freeway where a bus carrying students was struck by a big rig should have had a barrier down the median to prevent head-on collisions.

In addition, the National Transportation Safety Board said Friday it will determine if a fire suppression system recommended but not mandated for buses would have made a difference in the crash that left 10 people dead.

Mark Rosekind, an NTSB member, said his agency would be gathering information over the next two weeks but not immediately provide a preliminary cause of the fiery crash along Interstate 5.

EXTENDED: National Transportation Safety Board member Mark Rosekind talks at a press conference on Friday, April 11, 2014 about the investigation into the Orland tour bus crash. News10

The bus was carrying 44 teenagers from Southern California high schools to Humboldt State University to participate in a program that invites prospective low-income or first-generation college students to visit the campus.

A median of oleander bushes was the only barrier between opposing lanes on Interstate 5 in Orland where a southbound big rig tore into the northbound lanes, slamming into a charter bus. News10/KXTV

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