2 UPS employees die in workplace accident at Ontario International Airport hub - Daily Bulletin Two UPS employees were killed Monday, Nov. 25, in a workplace accident at the package-delivery service’s hub at Ontario International Airport, Ontario police said. UPS spokesman Steve Gaut said the accident happened sometime before 6 a.m. and involved two part-time package handlers. Luke Brown, a spokesman for Cal/OSHA, which investigates workplace accidents, said the victims were on what is called a tug. UPS Airlines said in a Twitter message that tugs pull dollies that are loaded with containers to be loaded onto airplanes. Some tugs have tops. The one the victims were in did not.