Prabhat Tara Ground, from where Modi will be addressing people, is about 10 km from the IM's training centre in forest area near Sithiyo village.
The village was in news after its four persons were found to be main suspects in carrying out serial blasts during the Prime Minister's rally in Patna last year.
One of the suspects died in the blasts while the other three, including IM's second-in-command, Haider Ali, were later arrested.
"We have learnt that the IM has formed several sleeper cells here. We are working to crack down their network with the help of NIA and other investigative agencies," said an IPS officer who requested anonymity.
MS Bhatia, Ranchi zonal inspector general of police (IG), said "a foolproof plan is being put in place."
From cloth material to iron poles, the security agencies are examining everything being used in the construction of stage and barricades.
A team of Special Protection Group (SPG) inspected the venue and informed the state police on security measures.
A senior IPS officer requesting anonymity said, "The SPG has asked us to note down details of families residing in localities adjacent to the ground."