11. Police responded by lobbing cannisters of tear gas. 12. Officers responded by lobbing cannisters of tear gas. 13. Inside the suitcase were two cannisters of gasoline hooked up somehow to a highway flare. 14. The cannisters are part of the emergency oxygen system in the passenger compartment of many airplanes. 15. The ticket had a description column, which reads, " Oxy Cannisters ." 16. Police replied by lobbing teargas cannisters . 17. Earlier in the day, the police had shot several cannisters of tear gas into the houseboat. 18. Today, those cannisters are still there, lying in wood crates in farmland in Southern California. 19. Still, proving that the cannisters sparked the fire will be no easy task, Caddell said. 20. The criminals have threatened to ignite cooking gas cannisters if the police try to storm the town.
