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KEYES, Calif. (KTXL) — Fire officials are still looking into what exactly caused a poultry farm in Stanislaus County to go up in flames.

Crews responded to Gemperle Farms off Barnhart Road just after 1 p.m.

“Our family is saddened by the tragic loss of all the hens in the damaged structure,” said Gemperle Family Farms in a statement.

According to the Animal Welfare Institute, this barn fire was California’s most devastating this year and the third deadliest in the United States.

The cause of the fire is still being investigated.

The family also says that the current egg supply will not be affected.

This is a developing story.