Five persons have been arrested for allegedly operating 550 dummy firms from a room in Gujarat's Surat city to pull off Input Tax Credit fraud worth several crore rupees under the GST system, officials said in Indore in Madhya Pradesh on Monday.

The five were held from Surat on May 25 by the Indore-based Central Goods and Services Tax Commissionerate with the help of Madhya Pradesh Cyber Cell. an official said.