Nine cases have been registered against Amrapali Builders, one against Supertech Builders and three against others, the PRO of the Senior Superintendent of Police, Prabhat Dikshit said.
"Flat buyers had put their grievances at a function attended by some ministers on Thursday. They had alleged that they had been cheated by the builders," the officer said
The PRO said that the ministers had told the police to probe the matter.
On the complaint of the buyers, the cases were lodged against the companies, he said.
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