The three opposition parties on Wednesday agreed to set up two special parliamentary panels to address an ongoing controversy over the deployment of an advanced U.S. antimissile system and reform the prosecution.

The agreement was reached after the floor leaders of the main opposition Minjoo Party of Korea and two minor parties -- the People's Party and Justice Party -- held talks over an array of pending issues, including the planned deployment of a Terminal High Altitude Area Defense battery.

The three parties will soon make a proposal to the ruling Saenuri Party to establish the panels, the spokesmen of the parties said during a joint press briefing.

The Minjoo Party has so far maintained an ambiguous stance over the deployment of THAAD with its interim leader Kim Chong-in supporting the deployment. The party is expected to adopt a unified position over the issue after it holds its national convention late this month.

The other two parties have been against the deployment plan, criticizing the government for failing to secure a national consensus before finalizing a plan to deploy a THAAD battery in the southern town of Seongju.

The move to reform the prosecution followed a high-profile corruption scandal involving a senior prosecutor.

Last month, state investigators indicted Jin Kyung-joon, the prosecutor who has been suspected of receiving over 900 million won ($800,600) worth of bribes from a businessman, from 2005 to 2014. (Yonhap)