Seoul, the 2010 champions, are pushing to secure automatic qualification for next season's AFC Champions League and remain in second place following their impressive display against seventh-placed Busan.

Jeju United were also 6-0 winners over the weekend, outplaying mid-table Chunnam at home.

Jeonbuk accounted for Gangwon 2-1, while Ulsan moved into third after defeating Gwangju by the same score.

Ulsan's victory saw Suwon drop down to fourth after the Bluewings could only draw 0-0 away to Daegu.

In other matches, Pohang Steelers defeated Incheon United 2-1 and Daejeon Citizen played out a 2-2 draw with Sangju Sangmu in a battle between the league's lowest-placed team.