A group of officials from the FBI of the US and the Royal Canadian Mounted Police flew down to India in July. They called on the chief of the police in Noida in a meeting coordinated by the Interpol. The details of the closed-door meeting held at the police headquarters in Gautam Buddh Nagar never emerged in the public domain until a series of raids were reported in the months that followed after a massive crackdown began on fake call centres that duped foreigners. On Friday, the police arrested 126 people in its biggest action so far against a fake call centre operating from a quaint office in Noida's Sector 63, a commercial hub, which has also seen similar illegal, fake call centres thriving. The call centre solicited money up to $3,500 from US citizens by intimidating them with arrest by the FBI over "stolen" social security numbers, a unique nine-digit pin number given to American residents, the officials said. Over a dozen such raids took place in October and November too, when fake call centres targeting foreigners, mostly American and Canadian citizens, solicited money to fix computers attacked by virus sent by them or by offering "tax benefits". "Between July 20 and December 21 this year, 25 fake call centres have been busted after they were found running dubious operations," senior police officer Ajay Pal Sharma told news agency PTI. "Close to 300 people have been arrested in the raids, over 400 computer systems seized while frauds worth crores, including those targeting foreigners, were unearthed during the process," Mr Sharma said.