India, Jan. 17 -- Even a week after 44-year-old Rachna Yadav, an Aam Aadmi Party (AAP) worker and residents' welfare association (RWA) member in Shalimar Bagh, was shot dead near her residence, Delhi Police are yet to make a breakthrough in the case.

Ten police teams have so far scanned footage from more than 200 CCTV cameras and used advanced technical tools, including the facial recognition system (FRS), to identify the two motorcycle-borne killers, who remain at large.

Senior police officers said that apart from trying to identify the shooters - suspected to be contract killers hired from Punjab or Haryana - investigators were also conducting raids to arrest Bharat Yadav, the prime suspect in the murder of Rachna's husband, Vijender ...