Four employees of the Fabindia outlet in Goa - where Union minister Smriti Irani claimed to have discovered a camera trained on the trial room - were arrested on Friday evening.
The senior executives of the ethnic lifestyle brand are likely to be questioned on Saturday.
While trying clothes at the outlet yesterday, Ms Irani spotted the camera which was positioned to record inside the small room. Footage from the camera, including that of the minister, was found recorded on a computer at the store, alleged a legislator of Goa, Micheal Lobo.
The four men - Paresh Bhagat, Raju Payanche, Prashant Naik and Karim Lakhani - had been detained for questioning earlier, said Karthik Kashyap, a senior officer of the local Crime Branch.
"We will also be questioning all the top bosses of Fabindia, including its Managing Director and Chief Executive Officer (William Bissell) tomorrow," Mr Kashyap told PTI on Friday.
The Goa Congress demanded immediate sealing of all Fabindia outlets across the country.
"What happened at Fabindia is shameful and shocking to all of us, the state governments all over the country should immediately seal all Fabindia outlets in the country and carry out a thorough inspection," said Goa Congress spokesperson Sunil Kawthankar.
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