Officials in Seattle say fumes from a chemical used to de-ice airplanes have gotten into the passenger cabin of an Alaska Airlines plane at Sea-Tac Airport.
Airport spokesman Perry Cooper says about 20 people have been treated for eye irritation. He says one crew member and two passengers have been taken to hospital. He says their condition does not appear to be serious.
An Alaska Airlines spokeswoman, Caroline Boren, says it's unknown how the fumes entered the plane.
It happened about 7:45 a.m. Wednesday as Flight 528 was preparing to depart for Burbank, Calif, with 143 passengers and a crew of five.
Boren says there have been no other de-icer problems in a week of snow at the airport.