MOUNT CARROLL, Ill. | A grain bin accident that left two teenagers dead and a third hospitalized could have been prevented and preliminary investigations found one worker was underage and employees lacked safety equipment, a federal Occupational Safety and Health Administration spokesman said Thursday.

"This was very preventable," said OSHA spokesman Scott Allen in the Department of Labor's Chicago office. "There are OSHA regulations that should have been followed and it appears they were not."

Authorities were called around 10 a.m. Wednesday to a bin owned by Haasbach LLC in Mount Carroll in northwestern Illinois, about 60 miles northeast of the Quad Cities. Rescue workers cut holes in the sides of the bin and drained thousands of pounds of corn to free the trapped workers.

The bin was half full and can hold 500,000 bushels of shelled corn, authorities said.

The three employees were working inside the bin at the co-op company when the accident happened, Allen said. A fourth worker outside the bin was not injured.

Two workers — Alejandro Pacas, 19, and Wyatt Whitebread, 14 — were pulled from the grain bin after 10 p.m. Wednesday and pronounced dead, the Carroll County Sheriff's Department said in a news release. A third worker, William Piper, 20, remained in fair condition at St. Anthony's Hospital in Rockford, a hospital spokeswoman said. All three were from Mount Carroll.