The National Transportation Safety Board says it will review details of a motor home crash in Kansas that killed five family members from Minnesota.
The review will include looking into laws that allowed a 17-year-old to drive the 57,000-pound vehicle.
NTSB spokesman Peter Knudson said Tuesday that the agency wants to determine whether the driver was "legally able to drive" such a large vehicle and whether the applicable laws and licensing requirements "could have played a role in this accident."
The crash happened Sunday as a large extended family and some friends returned from an annual motocross vacation in Texas. The vehicle broke through a guardrail on Interstate 35 in northeast Kansas and plunged into a ravine.
Five people were killed. Thirteen others, including the driver, were injured.