LOS ANGELES (CNN) -- Too many people cramming through a security checkpoint at the same time caused security officials at Los Angeles International Airport to order everyone out of one terminal briefly Wednesday.

Because of the overload, officials were unsure if anyone might have passed into Terminal Two without being properly screened, LAX spokeswoman Nancy Castle said.

After the terminal was evacuated, employees and vendors were re-screened through the security checkpoint. After that, passengers were allowed to re-enter.

Some travel delays were expected because of the evacuation.

The terminal 2 serves both domestic and international flights. Airlines operating out of there include Air Canada, Air China, Air New Zealand, Asiana, KLM, and City Bird.