The speaker of South Korea's parliament on Sunday proposed revising the constitution to curb presidential powers, citing public support for such a move after President Yoon Suk Yeol was ousted for declaring martial law.

"I would like to propose to the people that we should now quickly pursue constitutional revision," Woo Won-shik, the National Assembly speaker, told a news conference. "After going through the unconstitutional and illegal martial law and (then Yoon's) impeachment, the public consensus on the urgency of constitutional revision is greater than ever."

He proposed a national referendum on constitutional reform to coincide with the presidential election that must be held within two months of Yoon's ouster on Friday by the nation's Constitutional Court.