3 people have been arrested so far in the Surender Singh murder case. Remember Smriti Irani's close aide who was instrumental in her Amethi Campaigns was shot dead Friday night. Smriti Irani paid tribute to aide Surinder Singh yesterday. The MP designate from Amethi also performed Singh's last rites. Singh was shot dead by unidentified miscreants after which 7 people were detained, now 3 have been arrested. CISF and 3 companies of U.P provincial armed constabulary have been deputed in Amethi.