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

Mr. Lee cruised to victory on Tuesday after his predecessor pitched the country into chaos with a brief declaration of martial law.

Lee Jae-myung was sworn in as South Korea's president on Wednesday, just hours after his victory was certified in a snap election that brought an end to months of political turmoil in the country.