Prohibitory order under Section 144 CrPC was on Thursday clamped in Imphal West district for two months, a statement issued by the district magistrate said.
The move followed the unrest over demand for removal of Manipur University Vice-Chancellor Prof AP Pandey.
The capital city of Imphal is located both in Imphal East and Imphal West districts.
The Raj Bhavan, the Manipur University, the state secretariat and other prominent buildings are located in the high security zone of Imphal West district.
The district witnessed violence in the past few weeks over demand to remove Prof Pandey by various students' and teachers' bodies.
A 48-hour general strike called by these organisations passed off peacefully even as violence broke out at the fag end of the agitation. There had also been attempts to enter the Raj Bhavan forcefully.