South Korea will seek to establish a state investigative agency that will manage probes by the police.
The decision was reached during a meeting between the ruling Democratic Party, the government and the presidential office.
The new body will focus on preventing intervention by those unrelated to investigations, even if they are high-ranking officers.
The three sides also agreed to push to revise laws to block intel agents from becoming involved in illegal acts, such as surveillance of civilians or political intervention.
The move comes amid concerns the police may become too powerful after the National Assembly introduced a bill that would boost their investigative rights, by diluting those of the prosecution.
The bill is not about empowering a particular organization, but instead balancing their powers to keep each side in check.
There are also plans to draw up further measures to ensure the police don't abuse their power, and also to speed up efforts to introduce an autonomous police system -- under which some authority will be transferred to local governments from the state police.