The law will take its own course, he told reporters here on the sidelines of an event.
The raids were conducted across four cities in connection with a corruption case in which Lalu, his wife Rabri Devi, and son Tejashwi are among the accused.
On Rahul Gandhi's comments describing Prime Minister Narendra Modi as "weak" for not raising the issue of the H-1B visa in his talks with US President Donald Trump, Naqvi said the Congress vice-president should become "serious".
Naqvi was speaking on the sidelines of the Annual Conference of SCAs (State Channelising Agencies) of National Minorities Development and Finance Corporation (NMDFC).