Three workers at Disneyland were taken to the hospital early today when one mixed two chemicals that created a noxious vapor, fire officials said.

The incident occurred at about 5:30 a.m. when one worker was attempting to chlorinate a water-spray system near the Flix Fanfare attraction, said Maria Sabol, a spokeswoman for the Anaheim Fire Department.

The chemicals were hydrochloric acid and sodium hydrochloride, a bleach, she said. She said the result was a vapor similar to that which occurs when household bleaches are mixed with some other household chemicals against the advice of product warning labels.

Sabol said the chemicals were being used to chlorinate a water system that feeds water jet sprays for a children's play area.

Firefighters and the Anaheim hazmat unit were supervising the cleanup. No interruption in park activities is expected, she said.