LUCKNOW, Dec. 14 -- As city police and the Lucknow Municipal Corporation (LMC) step up their joint drive to identify illegal Bangladeshi and Rohingya immigrants in urban slums, two Assam districts nearly 1,500 km away have come into sharp focus: Barpeta and Kamrup.

Officials involved in the verification exercise say a clear pattern has emerged over recent weeks. Most people living in Lucknow's slums who are under scrutiny claim to be from Barpeta or Kamrup districts in Assam.

While documentation checks continue, the repeated mention of these districts across multiple slum locations has prompted authorities to conduct further investigations.

Teams from Lucknow Police's five zones and the LMC have been conducting door-to-door surveys in ...