680 Chinese nationals, suspected of operating an extensive online fraud operation cheating people in their homeland, are in custody following the biggest single operation by the Immigration Department.<br /> <br />Wednesday's raid in Cyberjaya was the end result of a month's worth of surveillance by the department, which acted on complaints made by the public.<br /><br />In a press conference on Thursday, Immigration Department director-general Datuk Khairul Dzaimee Daud said the police and department would work together to round up another 100 suspects who managed to escape.