Bareilly (UP): Three workers died of weakness while others fainted during cleaning the tank in the agro company unit in Bareilly on Tuesday, a senior official said.
Additional District Judge (City) Ram Dulise Pandey said the incident occurred in the unit farpur from BL Agro.
When three of them did not come out for some time, other workers were sent inside and he fell unconscious, Adm said.
They rushed to the Medical College SRMS Hospital, where the doctors stated Vijay (32), Neeraj (22) and Yasin (26) were killed after a medical examination.
The fourth working worker condition is very important, he said.
Active investigation to ensure whether the incident occurred because of toxic gas, said ADM.
Regarding the orders of the district judge, the team officers have been sent to the place for detailed investigations, he added.