The police are yet to register an FIR in the case and are waiting for the statement of the injured.
"Once we record statements of the injured and the witnesses, a case under relevant provisions of the Indian Penal Code will be registered," Sector 55 station house officer Devinder Singh said, adding, "We are yet to learn who was running this unit."
The police said the post-mortem of the dead will be done once all of them were identified. Two of the dead have been identified as Durgawati Devi, of Ballia in Uttar Pradesh, and Kamlawati Devi, of Patel Nagar, Faridabad.
"This is the first such incident in this crushing zone," Dharamvir Bhadana, the president of the Pali Crusher Zone, said.
"The wall that collapsed was about 25ft long, 15ft high and one and half inch wide," he added.