The organisation, working for the cause of Union Carbide gas leak disaster, also demanded that a case should also be registered against the engineer responsible for the upkeep of the water tank.
"The incident had taken place due to the sheer negligence of the administration and hence a FIR must be filed against these three persons," Sangthan convenor Abdul Jabbar told reporters here.
He claimed that the issue of poor condition of the tank had been raised with the administration many times before, "despite that nothing was done in this regard".
"It was because of this the water tank collapsed and seven innocent lives were lost," Jabbar said.
Jabbar also criticised Chief Minister Shivraj Singh Chouhan for not visiting the accident site so far.
An overhead water tank had collapsed in Saibaba Nagar slum area here in the wee hours yesterday, killing seven persons and injuring 35 others.