A man was found dead on a Pennsylvania farm after officials said he was overcome by "silo gas."

The Garden Spot Fire Rescue in Lancaster County said in a Facebook post that first responders were dispatched for a silo rescue on Saturday afternoon.

When first responders got there and gained access to the top of the silo, they said they found the victim, who "appeared to have been overcome by gas." He was unresponsive and presumed dead, since no one had been in contact with him for hours.

A man was found dead on a Pennsylvania farm after officials said he was overcome by "silo gas." (Photo: Garden Spot Fire Rescue/Facebook)

Rescuers said they learned that the silo had been filled about two days earlier with "high moisture corn product." Crews used gas meters to sense nitrogen dioxide

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