NTSB investigators and local authorities examine the scene of a plane crash near the Butte Airport in Butte, Mont., in March 2009. (Mike Albans/Associated Press)

U.S. transportation safety officials want airlines to prohibit child passengers younger than two from sharing airplane seats with their parents after the 2009 crash of an overloaded plane in Montana.

Current rules allow toddlers to sit on their parent's laps during flights.

The Federal Aviation Administration says it will look at the new National Transportation Safety Board (NTSB) recommendation for all children to be required to have their own seats and seatbelts.

The NTSB, which does not have the authority to make regulations, issued the recommendation as part of its ongoing investigation into the March 22, 2009, crash of a 10-seater plane in Butte. The crash killed all 14 people aboard, including seven children from three California families.

In the past, the FAA has said the cost of buying an extra airline ticket could force some families with small children to drive instead of fly, which would result in even more child injuries and deaths.