An IIT Bombay student was held on digital arrest and defrauded for Rs. 7.29 lakh after the scammer impersonated as a Telecom Regulatory Authority of India (TRAI) and forced him to pay the money by threatening and intimidating him, police said on Tuesday. There have been a few cases of digital arrest where a senior citizen was scammed for Rs. 32 lakh and a designer was scammed for Rs. 2 lakhs. The digital arrest is a common thread in all the 3 cases where the scammer posed as either a government officer or posed as a FedEx employee confirming a courier delivery and holding the person hostage over a video call.