On the basis of a report by poll authorities in Manipur, the EC had yesterday directed the state chief electoral officer to get the FIRs filed.
The advertisements were published yesterday ahead of the first phase of elections in the state.
The Commission identified the papers as Sangai Express -- Manipuri and English editions -- Poknapham, People's Chronicle, Naharolgi, Thoudang, Imphal free press, Echel Express and Huiyen Lanpao.
While there is no bar on the publication of election advertisements 48 hours before the polling, a rule introduced by the Commission during the Bihar Assembly polls says that such advertisements should be cleared by its media certification and monitoring committee.
The new rule was enforced after the BJP brought out some controversial advertisements during the Bihar elections.