Centre's Special Investigation Team, SIT probing the 1984 anti-Sikh riots is set to reopen and reinvestigate around 75 closed cases in Delhi. <br/><br/>According to official sources, Delhi had 237 anti-Sikh riot cases that were closed because of non-availability of victims or lack of evidence. <br/><br/>After reviewing their documents, the SIT has decided to reopen around 75 cases. The SIT will issue advertisements regarding these cases and ask victims and witnesses to join the probe.