Notably, Ukkadam is considered to be a sensitive area and has a Muslim-majority population. The blast on Sunday took place outside the famous 'Kottai Eshwaran Temple'.
The incident in Karnataka was discovered when a 19-year-old woman disappeared on October 5 and her mother went to Yeshwanthpur Police Station to report her missing.
Days before Hamedi's arrest, an Iranian photojournalist named Yalda Moaiery was arrested by the Iranian authorities during the anti-state protests while she was covering the agitated crowd on Hejab street in downtown Tehran.
Singh, who is the fourth accused in the case, is suspected of blackmailing the female student who allegedly recorded several objectionable videos of female students in the common washroom and sent them to his friend Sunny Bhatia in Shimla.