Nikita Singhania, the estranged wife of Bengaluru-based techie Atul Subhash who died by suicide alleging harassment by Singhania, has been arrested from Haryana's Gurugram. Singhania's mother Nisha and brother Anurag have also been arrested from Uttar Pradesh's Prayagraj in an abetment of suicide case. Bengaluru Police had directed Nikita's family on Friday to appear before them within three days.