LOS ANGELES _ Two UPS workers died at a shipping hub at Ontario International Airport on Monday morning after a vehicle tipped over and crushed them.
The Ontario Fire Department notified the California Division of Occupational Safety and Health at 7:21 a.m. about the double fatality.
"According to the outside source, a tug tipped over and crushed the two employees," Cal/OSHA spokesperson Luke Brown said. Tugs are tractorlike vehicles used to tow heavy shipment.
The airport in Ontario, about 55 miles west of Los Angeles, is a major shipping hub. In 2016, it underwent an expansion to double its production, according to the Press Enterprise.
UPS was not immediately available for comment Wednesday, and Cal/OSHA, which is investigating the fatal accident, said it could not comment on the tug that was involved.