The incident occurred last night when the shuttering of the roof of Shri Sai Food Production Company collapsed, trapping 35 workers under the debris, police said today.
33 workers were rescued from the debris with the help of heavy machines an were taken to a nearby hospital, where condition of 20 workers was stated to be serious.
Rescue operation was on to pull out two more workers feared trapped underneath the debris.
District Magistrate Yogeshwar Ram said that it was still to be ascertained what led to the incident.
He said that sub-divisional magistrate, Fatehpur, has been sent to the spot.
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