The racket by the five companies was busted and three people were arrested on May 23, officials said. The owner of the firm, arrested Thursday, had taken 'fraudulent' input tax credit (ITC) based on fake invoices received from nine different entites located in Kolkata and Hyderabad without actual receipt of goods, principal commissioner M Srinivas said in a press release here. The fraudulent ITC taken was utilised by the firm for evasion of GST payable by them on their supplies of aluminium and copper scrap, which were procured from the open market and unregistered suppliers, the senior official said adding the total amount of fraudulent ITC taken based on the fake invoices is Rs 5.76 crore. Thus, the total value of goods involved in the bunch of cases is Rs 143 crore and the total fraudulent ITC involved is Rs 25.74 crore, he said. Investigation is on to identify other firms involved in the fake invoice racket.