About two dozen people were being treated after complaining of noxious odors and burning sensations in their noses and throats at a business in Carson, the Los Angeles County Fire Department said Monday night.
Patients were being evaluated at the location at South Maciel Avenue near East Dominguez Street, the department said.
Television news footage showed multiple ambulances at the scene, where several businesses are located. Some people were transported to hospitals, according to news reports.
No other details were immediately available.