LUCKNOW, Nov. 12 -- The house of Shahid Ansari, a retired employee of the Uttar Pradesh health department, became the centre of investigation in the Delhi bomb blast case on Tuesday when teams from the UP anti-terrorist squad (ATS) and Jammu and Kashmir Police reached his residence in Khandari Bazar, Lalbagh.

Officials said the joint team questioned Ansari for about 45 minutes regarding his children, Shaheen and Parvez, both doctors. The house was also searched, but no objectionable items were found.

Located at the dead end of a narrow lane, Ansari's small house drew a large crowd of media persons and curious locals as police cordoned off the area. The team had to make its way through congested lanes, while local police managed the crow...