A union report says thousands of workers at Los Angeles International Airport didn't know what to do when a gunman opened fire last year in a terminal.

The SEIU United Service Workers West report obtained Friday by The Associated Press says sky caps, wheelchair attendants and others weren't prepared for an evacuation and were hampered by poor communication.

It says workers improvised to help passengers during the hours-long airport shutdown.

The union conducted the study, to be released next week, after the airport didn't include it in a review of the Nov. 1 shooting that killed one airport screener and injured three others.

The union report calls for more emergency training, participation in drills, and specialized training for workers dealing with disabled passengers or security.

LAX spokeswoman Nancy Castles said the airport's upcoming review will discuss including the airportwide community in emergency response efforts.