Mumbai :The Mumbai Police on Friday arrested four people in connection with the vaccine scam in Mumbai which is believed to have spread its net from one housing society to production houses, which are now allowed to organise vaccination at their premises. The overall scam came to the fore after several discrepancies were found out in the vaccination certificate, hospital name, vaccination date etc. But whether the original vaccine has been administered to these people is being investigated.Mumbai's Hiranandani Estate Society organised a vaccination camp on May 30 where about 390 people were given the first dose of the Covid-19 vaccination. As they started receiving their vaccine certificates (provisional), the residents found that the name of the hospital was not matching, the dates were wrong. And also, after they were administered the doses, they received calls asking for their Co-WIN OTP, which indicates they were not registered on Co-WIN before vaccination. The hospitals dragged into the controversy have denied any involvement.Following the government's workplace vaccination policy, several production houses of Mumbai have got their employees vaccinated. But as the scam of the housing society came to light, a number of production houses, including Tips Industries Limited, have reportedly complained of a vaccination scam. According to reports, Tips Industries Limited head Ramesh Taurany has raised suspicion as none of his employees, who were vaccinated on May 30 and June 3, has received their vaccination certificates. Tips was told that their vaccination certificates will be issued by KokilabenDhirubhaiAmbani Hospital.