An American Airlines Boeing 757 made an emergency landing today at LAX due to smoke reported by the pilot. The flight carrying passengers from San Francisco to Miami was also carrying hazardous materials, but, at first it was unknown if they were the cause the incident that diverted the plane to the airport. Later, FAA officials said that the material was hydrochloric acid and it was not the cause -- it probably came from a recently serviced hydraulic system. All passengers disembarked from the plane safely at Terminal 4, said LAX Spokesman Marshall Lowe to LAist. Passengers are now being booked on other flights.