NTSB Investigates Long Beach Tunnel Crash After 4 Die in Fire

National Transportation Safety Board investigators are probing a fiery car crash that killed four people early Saturday morning near a Long Beach Airport runway.Emergency responders discovered the victims inside a gray sedan that hit a tunnel center divider and caught fire at approximately 1:18 a.m.Local authorities closed Lakewood Boulevard for several hours as federal officials began analyzing if speed or impairment caused the single-vehicle collision.