WASHINGTON (AP) — Federal accident investigators say they're concerned that the nonmilitary government agencies that collectively operate more aircraft than the world's largest airline are subject to little federal safety oversight.

The National Transportation Safety Board is hosting a forum Wednesday for Federal Aviation Administration and other government officials to discuss ways to address the problem.

Since 2000, the NTSB has investigated at least 349 accidents resulting in 135 deaths that involved aircraft owned by or operated under contract for government agencies.

The FAA says it doesn't have the authority to regulate other government agencies. Federal, state and local agencies own or lease more than 2,400 nonmilitary planes. The world's largest airline — created by the merger of United and Continental — and its regional carriers operate fewer than 1,300 planes

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