South Korea's voters cast their ballots in a snap presidential election sparked by the impeachment of Yoon Suk Yeol.

The new president, who will take office immediately, faces a number of pressing challenges including repairing domestic divisions, navigating US trade tensions and confronting North Korea’s growing nuclear threat.

Both Lee and conservative Kim pledged change for a country deeply scarred by a shock martial law briefly imposed by former leader Yoon Suk Yeol.