VARANASI: Varanasi: Following Monday's explosion near Red Fort in New Delhi, investigation agencies have intensified efforts to trace over half a dozen terror handlers linked to Azamgarh in eastern UP. Names of several such handlers - including Azamgarh's Dr Shahnawaz, Bada Sajid, Salman, Khalid, Arif Junaid, Dr Asadullah Akhtar and Mirza Shadab Beg - had surfaced after the Shramjeevi Express blast in Jaunpur (2005), Batla House encounter (2008), and Delhi high court blast (2011), but they remain untraced. Agencies are now piecing together the puzzle to locate them. "All police chiefs in Varanasi's districts have been asked to start a fresh exercise to track terror handlers," said ADG (Varanasi) Piyush Mordia.