Quebecor Inc. has filed an application to intervene in the federal government's review of Corus Entertainment Inc.'s proposed debt restructuring, marking a significant escalation in its efforts to acquire the Toronto-based media company.

The Montreal-based group aims to block the financial overhaul, arguing that the restructuring could undermine its strategic interests in a potential takeover.

This move follows repeated rebuffs for Quebecor in its attempts to gain control of Corus.

By entering the regulatory process, Quebecor is attempting to leverage the government's oversight of the transaction to stall or alter the restructuring plan, which is a critical component of Corus's financial strategy.

The intervention adds a layer of regulatory complexity to what was primarily a financial restructuring exercise.

The development highlights the intensifying competition in the Canadian media sector, where Quebecor has long viewed Corus as a key target for expansion.